Best believe

Just a way of saying, you can bet on something to happen if a another event should occur

Person 1: I heard Rosa said she was going to fight you

Person 2: if she touches me best believe I will whip her ass

by tacoboutit July 03, 2017

everybody and their mama

It includes everyone, and sometimes almost literally and their mama.

Person 1: I told you what happened in confidence you would keep it to yourself but you ran around running your mouth to everybody and their mama

Person 2: it sort of slipped out, I'm sorry!

by tacoboutit July 03, 2017