(Verb) To contact, connect with, etc. (usually in the future) via phone, text, or email but it can also be used to describe meetin up with someone in person.
"Yo imma links you after class."
"We gonna links with Ty and Jay on 149th and Lennox."
Basically just you're phone number.. but usually said in a rude way or when you're mad. Meaning like the number ain't jack, who the fuck cares..
"Whatever ma, I didn't give no one your jack number.. I'm off this."
"Fuck you nigga. You gonna keep sayin that shit then just delete my jack number."