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1.
*only use when you recieve something from someone else, and you want to show your appreciation*
johnny: dude, why'd you just give me your poptart wrapper?
vinny: cus i love you man
johnny: oh i love you too bro, that's dedemptuous, thanks.

OR

susie: awww mary sue you got me ice skates, that's dedemptous!
mary sue: you're welcome, im glad you like them.
by Camerrron May 02, 2009