A ButtBabyy is any child that results from semen seeping into the vagina after anal sex. ButtBaby's can be prevented by using a condom, birth control pills, other contraceptives, and by simply not engaging in anal sex.
Father:"Son, now that your 16, its time we tell you that you werent planned, you were a ButtBaby."
the ultimateconversation flip. i.e. when you have gotten too in depth in a story and need to escape quickly to a less awkward subject.
"And then I was sitting on the toilet with a bottle of prozac, a bong, and the stripper's vibratior and I..."
"..."
"buttanywayhowareyou, sorry for the rant."