A deceptive phrase used as a euphemism for masturbating while still using an instant messaging site or program. More commonly practiced by males, this phrase gained popularity as earlier phrases like "be right back" or "going to the bathroom" became too obvious.

the whale tail is the shape formed when a g-string rides up high over a womans trousers

The act of masturbating in someones sock drawer as a vengeful act to get back at someone.