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2.
1. Sex advice shared verbally and handed down as truth. Usually spread by virginal 14 year old boys that wish to appear more sexually savvy than they actually are. This advice is not only ridiculous, but can often be dangerous.

2. Bragging about sexual exploits while talking to other men in order to foster an image of being a sexual tyrannosaurus. It is commonly accepted as being utter bullshit by the other people listening.
1. Dude, I heard that right after you fuck a skank bareback if you pee on your hands and scrub your dick with it, you'll totally not get herpes.

2. Jim: "Do you really buy that shit about him getting it on with her older sister and her friend?"
Marvin: "Fuck no man, that's just part of Tommy's fuck lore."
by Creeping Gibs November 13, 2010
 
1.
When somebody embellishes their sexual encounters, until it sounds like something that is definitely made up.
Dick #1: Hey dude, did you hear that Tim did 8 chicks at the same time.

Dick #2: Yeah, man. But I don't think it's true. It's definitely fucklore.
by M. A. Peabody. February 10, 2009