The act of masturbating after an incomplete sexual satisfaction session. In other words, masturbating after your lady stops pleasuring you right in the middle of the act.
Man 1: Dude my girlfriend just stopped blowing me halfway through!
Man 2: Whoa man what are you gonna do?
Man 1: Man, I'm gonna go Rib the Baby all over her pillowcase.
Man 2: Whoa man what are you gonna do?
Man 1: Man, I'm gonna go Rib the Baby all over her pillowcase.
by Weaton Leemour November 20, 2008