A very sexually active person that is always smoking marijuana. His dick tends to be larger than most and that is the reason he is sexually active a lot. People look at a Brendan and wish they were him. His looks, courtesy and of course, his sex drive is the reason that women just want to make love with him.
Can also mean somebody with the above traits.
Girl 1: Oh my god! Is that Brendan?
Girl 2: I hope so...I really want his love stick inside of me
Girl 1: No he's mine
Girl 2: He's mine
Girl 3: He's mine!
Guy 1: Look at that brendan.
Guy 2: Fuck him dude. Just because his dick is larger than ours it means we don't get chicks.
Guy 1: I wish I was him.
Guy 2: Ewww you fag.
*Guy 1 walks away*
Guy 2: Yeaaa.... I actually wish I was him