get it on

a euphemism for sex, popularized by Marvin Gaye in his classic "Let's Get It On"

I've been really tryin , baby
Tryin to hold back these feelings for so long
And if you feel, like I feel baby
Come on, oh come on,

Let's get it on

get it on

having sex
doing it

you get my flow

Dan, go get it on with Susie after the party.

get it on

To have sexual intercourse

I am getting it on right now on the phone

get it on

get something started

I got my popcorn, I got my candy, I got my baby; let's get this movie on

get it on

To fight someone.

"Me and him gunna get it on yo'."

Get it Get it

A positive statement to pump someone up like a cheerleader. To achieve a goal. Reinforcement on the repetitive notion to achieve maximal greatness at the task at hand.

Kelli "I'm takin' two cookies"
Jami "Get it Get it!!"

Get-that-in

Phrase encouraging whomever is listening to go ahead and move forward, doing whatever it is one is talking of doing without haste.

Brian told Bret, "Bro, if you gonna go get me my money you might ought to go ahead and get-that-in before I have to go".