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To have sexual intercourse
I am getting it on right now on the phone
by Anonymous August 29, 2003
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
by 108 December 05, 2001
having sex
doing it

you get my flow
Dan, go get it on with Susie after the party.
by estizi9 May 11, 2006
get something started
I got my popcorn, I got my candy, I got my baby; let's get this movie on
by Anonymous December 05, 2001
To fight someone.
"Me and him gunna get it on yo'."
by Diego August 21, 2003