was originally used in a 1950's song.
It is an act where, once sex has become boring with you sexual partner,
as intercourse is taking place, without your partner knowing, you make a funny face, cross your eyes or stick your tongue out, making comedy with yourself. You have a feeling of monotony,boredom.
I was really bored with yolanda last night, seems like the same meat and bland potatoes... I laughed to myself as I did the watootsie...