Top Definition
Stands for "I will think of you when I masturbate", A creepy message to put in the back of your classmates yearbooks.
"Julie, HAGS! See you next year! IWTOYWIM!"
by Urban Dictionary January 26, 2009
An acronym for "I will think of you when I masturbate"
Beautiful Woman: "Hey Jarret, IWTOYWIM!"

Handsome Young Fella: "What does IWTOYWIM mean?"
Beautiful Woman: "I will think of you when I masturbate..." ;) ;D 8D
by jroeishere June 17, 2016
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