A more polite way to refer to a woman's anus, or to refer to a woman's anus while in the company of children, elderly, or parents.
From this angle I have a really good perspective of your backyard bird.
Do you think her backyard bird is bleached?
The other night I got my second knuckle into her backyard bird.
the art of flailing your arms as if you had bird wings and screaming a loud "caakkaaaaawwwww" in conjunction with putting on your best stank face.
Also see Stank face
Chris: did you go to the Veterans of Foreign Waves show last night?
Alex: yeah dude! they dropped one track and everyone was doing the dirty bird
Ben: Are you guys talking about the 8,000 person dirty bird at the VFW show?
man: i love life
flappy bird addict: what liiiifeee?
man: a beautifulplace that doesnt have flappy bird.
flappy bird addict: screw that im playing flappy bird.