To be in 100% control of a particular situation, and to have previously orchestrated a favourable conclusion.
Dang Mack, "Why would you kick that fine girl to the curb?" Listen man, don't you worry about me, "I got it on lock"
V. while either in or out of a relationship, when a man has a woman that he can hook up with at any time of the day.
Caleb: I've been having a dry spell lately.
Mubeen: Not me, I've got it on lock with Kelsey.
Caleb: Liar!
Mubeen: Na it's true man she'll do anything I want, any hour of the day.
Caleb: You are a god.
Imma get it 100% or down. Not being on unlock
Ready for the math test Susie don’t worry I got it on lock