Top Definition
1.The sexual act of coring a squash, inserting said squash in the anus allowing your sexual partner a cool, slippery, tiny hole to play with.
2.The squishing/bending/smashing of ones penis during vigorous anal with your girl/boy on top.
3.The act of falling backwards into someone ass first to determine the size of ones penis.
1.My girlfriend wasn't satisfied until I buttlesquashed that ass!
2.I'm walking funny cause my girl buttlesquashed my junk.
3.I didn't think she liked me until I got buttlesquashed.
by DurtyKirty July 26, 2011

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