Definitions by Orea93

Dirty Byrd 

After you are done having sex with a girl you spread open her vagina and/or butthole and take a crap inside of the vagina and/or butthole

"Dude, do you know Christine"
"Yea, why"
"I just did a dirty byrd in her cunt"

Dirty Byrd by Orea93 June 1, 2009