To take part in a colining, means to be an annoying asshole or act in a childish behavior, but in a good and or hysterical sense.

A pubic hair piece. A toupee for the pubic area/genitals. In the 1700’s when mercury was used to treat sexually transmitted diseases (Gonorrhea or Syphilis) one of the side effects was the loss of pubic hair. To disguise this condition, that was not cured by mercury, a Merkin was employed.

The act of mishearing/eavesdropping , and then proceeding to reinterpret that word or phase to the eavesdrop-pee