When you find out that a girl/guy you are dating is into something really cool and unexpected so you must make them your gf/bf.
Guy 1: "So this girl I scored wants to go see Iron Man 2 and go shooting!"

Guy 2: "Dude!! Lock it down!!"
by RedandGreen May 02, 2010
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Let's make sure Greg's cool with tonight before we lock it down.
by lottanyx February 11, 2010
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Shut the fuck up and calm the fuck down, please.

Traditionally used on a film set, but also useful for stopping multiple friends, lovers, and strangers from doing stupid, often alcohol-induced things.
"Hey, give me five dollars and we'll grab that mannequin's titties."

"LOCK IT DOWN."
by ABlair January 13, 2008
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Basically the same as "hold her down" to have her back, protect her, be there for her etc..
When I find that girl, I'll lock her down, I swear that girl, will be the only one for me.
by JT PRoDucT December 31, 2017
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to confirm that something is taken care of; the situation is under control or lockdown
Reservations have been made at the hotel, the limo is taken care of, called the place we're going......baby, it's all under lockdown!!
by Barbi.doll March 08, 2005
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The same as one of the definitions of "on lock", to be totally in control of a situation.
by Saucy August 15, 2003
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lockdown comes from the prisons, but is also used instead of 'grounded'
by Rastafari July 30, 2004
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