Top Definition
a kid that you only have to deal with sometimes do to the relationship you are currently in.
1. I could be in the relationship because I would only have to watch the kid on the weekends , like a rent-a-kid.
2. Like when your stupid baby daddy has another girl pregnant and pop out a dumb ass baby....and then guess what? now you got a rent-a-kid.
3. Got to rent their damn f*^kin kid and take care of 'em for the weekend, now that's a rent-a-kid.
by rent-a-kid June 20, 2011
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