A Block Baby is the child of a woman that doesn't know who the father of the baby is. In other words it could be anyone on the block. Therefore, it also insinuates she's a hoe.
Person 1: Did you see her baby? He's so cute.

Person 2: Yea. Too bad he's a block baby. That baby mama's a hoe.
by Check Mate June 14, 2007
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The act of using your child (baby) as a means of avoiding certain social situations.
1. Avoiding an unwanted hug:
Pick up child just when they are coming in for the hug. Bam! You been baby blocked!

2. Unwanted sexual advances:
"Oh thanks your pretty hot yourself, wanna see pictures of my seven month old baby?"

3. Unwanted date proposal:
"I cant go out tonight I have to stay home with my baby."
by MeggMaster321 December 4, 2013
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