Top Definition
When you think your buddys gone so you try to get a quick beat off, but they suddenly bust in on you while your tryin to whack it and you try to act like your sleepin, like nothin was goin on.
I left the house only to return to catch bakers ass tryin to sneak-a-beat to some soft core porn on showtime.
by jimmy haynes March 01, 2009
The act of secretly and quickly masturbating whilst your parents are home and/or at the grocery store.
"Bye mom, take your time at the grocery store! I'll be fine."
*Mother leaves*
"Heheheh, time to sneak-a-beat!"
by Peter Schoelch November 06, 2007
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