Engaging in anal sex with a butterball (A morbidly obese person) This can result in extreme depression, suicidal thoughts, loss of hearing, sight, and in some extreme cases: losing the ability to feel anything.

Friend 1:Did you hear what craig did?
Friend 2: No what did he do?
Friend 1: He butterball buttfucked Lisa last night!
Friend 2: Ew thats gross man!

Butterball Buttfuck by Jfeldster December 16, 2011

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Holy Buttfuck Batman!

A phrase for use when one witnesses a particularly horrific disaster. You might say "holy shit" after a car wreck. On the other hand, a plane crash would call for "Holy Buttfuck Batman!"

Robin: Holy Buttfuck Batman! The Joker just blew up a paint factory!
Batman: The Joker will get his just desserts, dear Robin, but we have more pressing concerns. Remove the Batplug and come closer...

Holy Buttfuck Batman! by Frederic Wertham December 2, 2007

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buttfuck

What happens to you when you use AOL.

I signed up for 300 free hours with AOL, and then preceeded to bend over and spread my cheeks...

buttfuck by Hiro August 29, 2003

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Canadian Buttfucker

1) One who is a complete tool or asshole.

2) A person who is unnervingly annoying.

3) Someone who fucks the butts of Canadians.

1) Person 1: Sally's boyfriend is a real Canadian Buttfucker.

2) Person 1: "Are we there yet?"
Person 2: "Shut up, Canadian Buttfucker!"

3) Person 1: "Who's a Canadian Buttfucker?"
Person 2: "Hitler."

Canadian Buttfucker by CBF4Life! September 18, 2010