Anything which can happen between a couple. There is no set definition as to what it may be, but it can be said that it is something that someone who is not part of the couple would not want to be around when it is occurring.
Hey you two! Remember: no hanky panky in the backseat!
This is a phrase which is used in order to show the act of putting someone down. It's like when someone says something extremely dumb, leaving himself completely open to insult, and then another person says something which brings shame and utter humiliation
to the person who just said the dumb thing. A third person is then introduced, being responsible to yell the insulting phrase in order to make the first person feel even more stupid.
person 1: Did you see that car? It was ugly!
person 2: Your face is ugly!
person 3: YOU JUST GOT MOPPED!