A strongly affirmative answer to any question.

Has become a common reply from the rise of TV show 'Who Wants to be a Millionaire"
Yeah definitely.. lock it in!
by megdino June 3, 2011
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On the Lock, is the act of getting locked. It is an Irish phrase.

Getting Drunk.
I went on the lock on Saturday night, and thats all I can remember
by Grey Hat Man May 18, 2011
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Device used by protesters to secure themselves to an imobable object and so prevent their removal.
Common examples include a section of drain-pipe with an iron bar through the centre set in concrete.
by bryn July 22, 2003
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To have something under control. Same with on point. Doing something really well, and having it be all yours.
Yo if you have that girl "on lock" just ask her for her number ma boy.
by BigPimppin6906 November 23, 2017
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This game is locked
The test I'm taking tomorrow is such a lock
by ReaganP September 30, 2005
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A special gathering or sleepover that takes place in a building from dawn 'till dusk, or 12 hours. At the beginning you're doing a bunch of activities and games, watching the movies the chaperones provide, until usually 9 hours in. And at this time everyone becomes either testy, zombie like, hyper, or bored. Usually the activities cease (except for the video game tournaments and the movies) and everyone falls asleep or just talks about a boring subject. By this time the food is all gone, so everyone is scavenging for any scrap of sugar.
The lock-in started at 7 pm and ended at 7 am. I think I passed out at 4 am.
by TestyWhenHungry April 23, 2011
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