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2.
A common school prank, used as the subject of a mostly nonsensical joke in Cory McAbee's film 'The American Astronaut'.
"When he asked the boy if he would like a Hertz Donut, the boy said 'Not if you're gonna stab me in the eye with a pencil'. 'I wouldn't even touch ya', said Mr Stevenson.

"So when the boy agreed, he presented him with a photograph of the young man's fiancée at a bachelor party, on some guy's table, fuckin' herself with a beer bottle.

"As tears filled the young man's eyes, Mr Stevenson was heard to say 'Hertz donut'"
by MrBoyt February 28, 2010
 
1.
Several sharp, quick punches to a persons upper arm. Meant to sound like hurts, don't it?
That Hertz Donut numbed my muscle.
by Dead Deer July 07, 2006