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1.
the act of pressuring a friend to eat a moldy peace of fruit
Hey dude, just eat it! Come on man, everyone's doing it! Just eat that rotting piece of fruit! Yeah man, pear pressure!

Fuck I'm so sick after being pear pressured into eating that rotten kiwi.
by urbandictionarytaughtmeallikno November 15, 2010
 
2.
When you fap and the jizz doesn't come out and causes pressure.
John: Last night I was fappin and now I have pear pressure.
Lucas: Fuck you, I am Japan.
by FuckYouIamJapan November 24, 2009
 
3.
A euphemism for the firmness of a pair of breasts.
john: That chick was seriously lacking in pear pressure.
duck:Fuck you, I am japan!
by angular flatulance November 25, 2009