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1.
A child conceived to Mormon parents, who by definition are subscribing to the Jello Plan.
Mitt and Ann Romney have five Jello Baby's. They were on the jello plan for sure!
by ThreeLeftShoes July 16, 2012
 
2.
the remnants of semen, natural body lubricants and/or artificial lubricants that pool and collect on surfaces or in the anal cavity after sexual intercourse
My boyfriend birthed our jello baby before we showered and went to bed.
by Rio September 30, 2003
 
3.
the remnants of semen, natural body lubricants and/or artificial lubricants that pool and collect on surfaces after sexual intercourse
we saw our quivering jello babies on the coffee table right before we fell asleep
by a-lo September 23, 2003