Blood in them pants

What you tell your friend when he feels an ugly woman is attractive simply because he has not been laid in a very long time and/or he is drunk.

No, she isn't hot. She has blood in them pants.

them pants

a certain type of legging pants that girls wear

“she got on them pants”

jump in them pants

Someone who wants to have sex with someone

Boy 1: hey I heard alliyah trying to jump in them pants
Boy 2: aww hell nah! *runs off*
Alliyah: come here (insert name)!!

Or

Girl 1: have you heard of in for it by troy lanez???

Girl 2: yeah!! I wanna jump in his pants!!