In a May-December relationship, a way to describe the younger partner, especially when the younger partner looks like it hasn't passed puberty yet. May be a warning that a statutory rape could happen.
52 year old Schizo Woman:I just got a boyfriend, he's kinda young.
Rosanne:How young? Is he milk money young?
52 year old Schizo Woman:He's 14.
Rosanne:How young? Is he milk money young?
52 year old Schizo Woman:He's 14.
by Wm. Wallace The Freedom Fighter March 4, 2008
Get the milk money youngmug.