Top Definition
When a man marries a woman who already has children.
So how come Rob doesn't hang out anymore?

Dude he got married a month ago and now has 3 kids.

3 kids!!??!!

Yeah he got an Insta-Family!
by The Real Tron 12345 November 24, 2008
The result of having three or more children at once.
Bob's wife had triplets, and now he has to trade his car in for a minivan to fit his instafamily.
by raymo03 July 05, 2007
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