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1.
I love you in the butt. Basically the two acronyms "ILY" and "ITB" meaning "I love you" and "in the butt" combined. Used to describe the degree of love in which you feel for someone.
Jack: I got the tickets for that Hannah Montana concert you wanted to see so much!
Jill: ILYITB.
by Sexy Batch June 19, 2010