A bird Job is when you cum into someones mouth, they swallow it and then regurgitate the semen back up. Then the person who came licks the vomited cum out of the others mouth. The same way as a bird feeds its babies.
Dude! you like bird job's? That makes you a manrantula!
by Rusty Bottoms, Dick Nipple March 13, 2009
when a girl gives a guy head while she is pissing.
I gave Tyler a BIRDJOB while I was pissing on New Year's Eve.
by Jack_a$$92 December 31, 2011