Chicken kiss

or Cloacal Kiss, refers to the way birds reproduce. The male and female press their cloacae ( the plural form of cloaca - the opening that a bird uses for waste and reproduction) together to fertilize the female bird's ova.

Also a slang term for vagina-to-vagina or anus-to-anus intercourse (see Fish Bump)

Aww, sick Chicken Kiss! Looks like Bessy's finally gonna lay.

Chicken Kissing

When a couple kisses each other with closed-mouth pecks, repeatedly, moving their head forward quickly each time. Commonly done by middle schoolers or high schoolers, when they don't know how to make out

*two kids walking through a school hallway see a couple pecking each other's lips*

Kid 1: Ugh. It's so gross to see people do that

Kid 2: Yeah. I hate to see people chicken kissing.