Back It Up

What is Back It Up?

1.

What a guy says to a girl he's fucking from behind - asking her to push her ass back so she grinds onto him.

Also, in lesser used context, it means a girl has a nice ass.

*A couple doing it doggy style*

Chrissy: "Oh that feels so good!"

Tom: "Oh yeah, you want it harder?"

Chrissy: "Yes!"

Tom: "Back it up, back it up!"

See doggy style, sex, fuck, dick, ass, back it up

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