Something a girl does to a boy to either get her way or take revenge for a previous discrepancy. Despite the term "kick" included in the phrase, it can be used to describe any method in which a girl uses her legs to gain a physical advantage over a boy, limited to attacking his nuts. She may use her knee or thigh to overpower her male opponent. Also deployed by males to males, but everyone knows it hurts more when a girl administers it.
1(To get her way): I wouldn't let Amy do it her way, but my tune changed when she kicked me in the nutsunder the table.
2(To take revenge): He never made fun of Amy again, after she kneed him in the nuts.
Something that is not funny at all and makes me angry when a girl does to a guy and she thinks its funny and then she brags about it with her fellow women friends. NOT FUNNY. hurts like hell