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When you have a sudden increase in blood flow to the penis from sexually arousing scenarios which causes the penis to puncture a hole through the article of clothing in which the stiffy is concealed.
Pop a stiffy mate.
by Chode Buster April 29, 2011
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Sep 9 Word of the Day
the thing that you don’t have when you’re phones percentage is over 20
phone: why don’t you go to sleep tommy it’s 2 in the morning?
tommy:why don’t you die you dumbazz
by lik_frls_dis.me February 12, 2020
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2
A way of stating that the male penis is soon to ejaculate. Otherwise known as a boner.
I Pop a Stiffy everytime I get to walk behind Payton
by Blevinz11z March 02, 2012
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