Bumper Snickers

During the Bush years (shudder!), I got a sticker that bore a parody of the "Intel inside" logo next to a picture of W. pointing to his head. It said "No intel inside." I never put it on my car, though.

On a milk-truck in an episode of "Father Ted":

Milkmen do it on your doorstep.
As I recall, Pat Mustard ("Christ! I forgot me feckin' trousers!") also had stickers that said "Young banger" and "Shit happens."