Barely Legal. Taken from two definitions of the word Just.
Definition 1: Barely; by a narrow margin; within a brief period of
time; only; merely
Definition 2: Legal; legitimate; guided by
justice; in accordance with standards; right; lawful; proper
Man 1: “You’d
better stay away from her, or you’ll end up in
jail!”
Man 2: “No worries, I checked her out. She’s Just Just!”