1)to be under really strict, severe obligations or rules
2)to have somebody under control
1) \"Yo,i can\'t go outside man, my parents got me on lock, unda sum really strict shit yo.\"
2)Girlfriend:\"Come here, now!\"
Boyfriend: \"Im coming, sorry i can\'t go right now\"
Boyfriend\'s friend:Damn dawg she got u on lock
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