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1.
Stereotype used to categorize individuals who fall into a fairly modern trend in child rearing, where the child is not properly raised. Instead the parent(s) occupy the child by setting them in front of a TV as opposed to actively engaging the child in productive activities. This type of childhood typically fosters poor social behaviors and disorders such as ADHD, beckoning use of term.
John is the most awkward boob tube baby I've ever run in to.
by Chillbur November 21, 2012
 
2.
A child who is conceived because there was nothing good on TV that night and the parents were bored.
I don't have cable- so my first son is a Boob Tube Baby I blame it on the show "Charles in Charge". My second son was a sponge failure.
by DOTK November 28, 2012