The fruit of a healthy natural relationship between a lady of child bearing age and a toilet seat adorned with random male jelly jewelry.
"No I don't know my dad, I'm a fucking Seat Baby"
"You can't microwave a kettle you fucking Seat Baby"
"You can't microwave a kettle you fucking Seat Baby"
by synackle November 05, 2008
by VapoRub Baby May 10, 2006
Because Ricky and Charlotte have only had sex once, in the back-seat of his car, and she is now pregnant, her child would be considered a Back-Seat Baby.
by Charlotte Lyons March 21, 2009
by Peter7029 January 25, 2012