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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The face one makes when someone takes a picture of their face up close, or one takes a picture of his/her own self close up, hence "locking in" the face they're going to rock in the picture.

Also see "hot face" and "hot check"
Dude 1: Hey man im gonna take a picture of your face!

Dude 2: Hold on let me lock it in
by Phil Cook November 20, 2007
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When you’re committed to one person in a relationship, and won’t let anyone else or anything tear the two of you apart. Only the two in the relationship has the key.
Cardi B and Offset are locked in now; he proposed to her!
by LulKnowItAll February 17, 2018
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We are taking a one hour twitter/blackberry break. lock in!!!

Get locked in!!!
by NicLydon April 9, 2009
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“I’m going to lock in for the frat house birthday!”
by tp219 June 8, 2021
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A persons long beautiful silky hair usually it can be used as a sexual stimulant!
As Chad was fucking Keirsten from behind her sexy blonde locks brushed his face and made his boner harder and harder!
by SlopNChop May 17, 2016
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