As opposed to the blumpkin, in which a dude gets his cock sucked while taking a dump, a bluffkin is:

a) the act in which a dude believes that his lady is going to suck his cock whilst he is taking a dump and instead, she leaves him alone such that he only takes a dump el solo;

b) the act in which a dude convinces his lady to suck his cock while he takes a dump, but doesn't actually poop.
1) I was totally gonna give my boyfriend a blumpkin, but he never pooped and thus, bluffkinned me.

2) Dude, my girlfriend gave me a bluffkin last night. I was so ready to shit and cum at the same time its not even funny. But she denied me the blumpkin. Bitch.
by Bulbous Jack H November 17, 2011
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The process of smoking, usually Marijuana, while defecating.
"I had a nice bluffkin today before work."
by Landowned November 2, 2009
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This is when you get a man on the toilet, mid-shit, with his dick in your hand, and instead of throwin that dick in your mouth, you give him the "fake-out" by pretending to swiftly run a comb through your hair like Arthur Herbert Fonzarelli.
I met Chasin on the toilet for a blumpkin, but much to his surprise, I gave him a bluffkin instead. "YOU JUST GOT BLUFFKIN'D!"
by Grundalina April 29, 2022
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