A long and girthy penis. Like a baby arm in length, but also extremely thick.
Pericles: So I heard you got his big donny last night. I told you it was a baby arm!
Carin: You weren't kidding that his cock is huge! You should know, though, that it is really a baby thigh. I think I might be permanently stretched out and need a daddy stitch. AND I had to stretch my mouth so wide to give him a bj that my jaw now pops.
A "Thigh Baby" acures when a male "pulls out" before ejaculating and the "left-overs" get on her thigh. Then by accident, or on purpose, some sperm gets into the vaginal area. Affect of this being a baby. This also explains that some virgins can get pregnant, if under the right curcumstances.
Brad: I don't know what happended, I pulled out but she still got pregnent.
Josh: Looks like you got a thigh baby, that sucks.
The ability girls and women have developed to hold several items at once in one hand. The skill has been developed due to the lack of pockets in women's clothing.
I thought she'd need multiple trips to carry her phone, keys, wallet, and Starbucks to her car since she needed the other hand to open the door, but she used her impressive girl grip to carry everything in one hand.