What is Undib?
1.
when a man calls 'dibs' on a woman, the undib is used to undo the dib when a better offer comes along or new information on said woman comes to light
"yo dude, you see that dime over there? i completely undib Kelly for her"
or
"hey man, you might want to undib that girl, bro. Turns out she's your first cousin"
See