There are 2 common meanings:
1/Used in military or police force: Reinforcements, support, help.
2/Computer using: create your secured data in case the computer goes down suddenly, mainly to prevent data loss.
1/Police officer shouts via radio: "Shot fired, shot fired. Officer down. Unit 26 to base, we got a situation here. We need back up immediately!" - "Roger, just hold on. Back up are on the way."
2/Before installing Smart Windows Care, we strongly recommend you to back up you data first to prevent yourself from losing important data.
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When cheapass loser fucking hillbilly thinks he is getting screwed out of overtime.
They are not giving me any jobs, the are backing them up for John.
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When you drive your car in reverse, you back up.
That moron scratched his car when he backed it up.
You should use both side and rear mirrors when you back up your car.
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A dancefloor technique to attract the attention of a partner. Essentially this involes backing your bootie towards your partner and getting close, often thrusting. This technique will initiate a grind type of dancing.
She's backing-up to you dog! Get in
Let's get on the dancefloor dog. We can back-up on those hotties over there
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An unusually large amount of semen stored in a man's body due to lack of ejaculation
I haven't jacked off in weeks. I'm backed up.
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I ate a whole block of cheese and now I'm all backed up.
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To back it up and get down.
An ancient saying, originating in Mesopotamia, recently reintroduced by rapper Pitbull in the song 'On the Floor' by the Jennifer Lopez.
Moments after entering the club, Matthew backed it up like a Tonka truck.
Joseph ordered a root beer at the bar, then proceeded to back it up like a Tonka truck.
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