Get it on
verb
To have sex.
“I can see the sparks between us. Let's get it on, baby!”
To engage in a fight.
“You want a piece of me? OK, let's get it on!.”
To hurry up; to get a move on.
“I need to get it on: there's not much time left.”
Synonyms: do battle, get some, do it, get it, make it, get a wiggle on, get one's ass in gear, get one's skates on