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"
by synackle September 23, 2008
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Term meaning WHORE when there are seven year olds in the room.
"You don't want your identity to be the biggest back seat baby in the school."
by VapoRub Baby April 30, 2006
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A baby conceived from having sex in a car, usually, but not limited to, the backseat.
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
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It is a seat made for babies in a car
A luxurious baby seat
by Peter7029 January 15, 2012
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