the act of fidgeting with
one's genitals (typically
male) as a
nervous response to arousal, and not for direct sexual stimulation. sometimes performed as an act of courtship or with the intent of seduction.
Mike: I was walking down the street and some
guy jumped out and started aggressively tugging at his balls in
front of me.
Jake: That was the
Boston Mooker! He was mooking you, you got mooked!