Having another person kiss you and transfer a beverage (usually alcoholic) to your mouth to make it less conspicuous you're drinking underage (or just because its fun)
Brian: I can't buy her a drink, she's underage!
Jason: Just use the baby bird on that bitch!
A sexual act in which one individual penetrates another doggy style, either in the vagina or the anus, and, right before one of them reaches orgasm, the penetrator vomits into the mouth of the penatrated, thus filling it's mouth like a baby bird.
I was never more happy than when Jordan baby birded me in New Orleans. I'm just glad his vomit tasted like string cheese and bacon instead of relish and olives.
A combination of baby bird feeding and bukkake. Everyone tries to nut before the other into the middle person's mouth. Who ever nuts last gets all the seed baby bird fed into their mouth.
Hey man, wanna play baby bird? We need one more person.
Fuck no! Last time I played, I nutted last.
When you receive a blowjob but you are not the slightest bit aroused. Your flacid and lifeless penis looks like a worm that a young birdling is pecking at.
That landcow of a girl was so nasty she was doing the baby bird until I threw her out.