I had one on my old car (before it got totalled) - it read "Unless you're a hemorrhoid, get off my @$$!"
I have one on my current car that reads: Is there an excuse for you?
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The day we stop learning is the day we start dying!(c)
*Member of the HADB clan. Mage extraordinair.
Occasional subjugate to Gwhanos the Fluffy

*
(when G is behaving)

"Allright! We'll call it a draw."