lock it down 

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!!"

lock it down by RedandGreen May 2, 2010

lock it down 

to finalize a decision or plan

Let's make sure Greg's cool with tonight before we lock it down.

lock it down by lottanyx February 11, 2010

lock it down 

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."

lock it down by ABlair January 16, 2008