Crank Shaft??? Yeah Already Done That Twice Today
🎁 BUY 2, GET 1 FREE
Add 3, 6, 9—or keep going. Every third item is free automatically.
✓ Weatherproof + UV-resistant
✓ Ships in 1–2 business days
✓ Made in-house in Washington
Description
Crank Shaft??? Funny Bumper Sticker & Car Magnet
CRANK SHAFT??? YEAH... ALREADY DONE THAT TWICE TODAY.
Finally, a bumper sticker that combines mechanical engineering, chronic horniness, and the emotional maturity of a middle schooler who just discovered double entendres. Is it about engines? Is it about something else? Yes. Next question.
Funny Bumper Sticker for Gearheads With Filthy Minds
Some people spend their weekends rebuilding engines. Others spend theirs cranking their shaft. The truly gifted among us do both.
This funny bumper sticker features a flaming piston skull and a statement that absolutely nobody asked for. It's automotive humor at its finest: mechanically adjacent, deeply inappropriate, and somehow still technically about car parts.
Perfect for mechanics, car enthusiasts, truck owners, hot rod fanatics, and anyone whose entire sense of humor peaked somewhere between shop class and a questionable Craigslist transaction.
WARNING: May result in uncomfortable eye contact at stoplights, disappointed family members, and unsolicited conversations about engine components.
Weatherproof Sticker for Whatever You're Cranking
Printed in-house using premium, all-weather vinyl, this weatherproof sticker is engineered to withstand rain, sunshine, road grime, and the consequences of your own personality.
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Size: Approximately 8.5" × 2.5"
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Waterproof, smudge-proof, and fade-resistant
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Car wash-safe when properly applied
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Durable outdoor vinyl for long-lasting automotive stupidity
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Handmade in Washington, so slight sizing variations are possible
Stick this vinyl sticker on your car, truck, toolbox, garage cabinet, or any smooth, glossy surface that could benefit from a deeply unnecessary announcement.
Car Magnet Option for Temporary Bad Decisions
Not ready to permanently announce your shaft-cranking habits to the neighborhood?
We respect your cowardice.
Choose the removable car magnet instead! Standard magnets are 20 mil thick, with an extra-thick 30 mil option recommended for colder climates and windy conditions.
IMPORTANT: Magnets only stick to magnetic metal. Most modern bumpers are plastic, because apparently nothing is sacred anymore. Test compatibility before ordering.
Remove magnets before car washes and extreme weather.
Application & Other Extremely Unsexy Details
Clean and completely dry the surface before applying. Avoid wax, textured plastics, and low-adhesion materials. Press outward from the center to prevent bubbles.
Orders ship worldwide from Washington in approximately 1–3 business days. Mockups aren't to scale, and colors may vary slightly by screen.
Buy 2 Get 1 Free. Triple the Immaturity.
Grab this bumper sticker and two more questionable declarations. Every third qualifying item is FREE!
No code required. Just three opportunities to disappoint your parents.
Frog Mustard Stickers: Giving strangers too much information since whenever you found us.
Size, Materials & Care
For best results, please review and follow the full care and application instructions included with your order and available on our FAQ page here.
Sizing
- Rectangular bumper stickers are approximately 8.5 × 2.5 inches.
- Die-cut stickers and magnets are typically 3–4 inches.
- Sizing may vary slightly, especially on hand-cut magnet materials.
- Mockup images are not to scale and may appear larger for visibility.
Materials
- Made with premium all-weather vinyl.
- Stickers are waterproof, smudge-proof, fade-resistant and car-wash safe when properly applied.
- Designed for outdoor use on smooth, clean, glossy surfaces.
- Apocalypse-resistant, within reason.
Magnets
- Standard magnets are 20 mil thick.
- 30 mil extra-thick magnets are available and recommended for colder climates.
- Magnets only stick to magnetic metal surfaces.
- Many modern bumpers are plastic, so please test your vehicle before ordering.
- Try your trunk, doors or side panels if your bumper is not magnetic.
Basic Care & Application
- Apply only to a clean, dry, smooth, glossy surface.
- Clean the surface thoroughly before applying and allow it to dry completely.
- Avoid textured, plastic, rubberized, dirty, dusty, waxy or low-surface-energy surfaces.
- For best results, apply in mild temperatures and press firmly across the full design.
- Do not apply below 45°F.
- Wait 24–48 hours before washing your car after applying a sticker so the adhesive can bond.
- Remove magnets before car washes or extreme weather, including snow and high winds.
- Clean beneath magnets periodically to prevent trapped dirt or debris from affecting your paint.
Important Surface Disclaimer
Frog Mustard products work best on glossy, smooth, clean and dry surfaces. Many coolers, kayaks, vehicle cladding and similar items are made with low-surface-energy plastics, which can make it difficult for adhesives to bond—even when using premium vinyl.
We cannot offer refunds for poor application, failed adhesion on textured, plastic, dirty or otherwise incompatible surfaces, or magnet incompatibility with non-magnetic vehicle panels. Please message us before applying or purchasing if you are unsure whether your surface is compatible.