The stuff that involves the male organ and your hand. In other words, yet another euphemism for masturbation.
"Open that door, man! No, wait, are you appreciating Willie again?"
"Even though there seems to be no chick on this Earth to appreciate you, Willie, know that I'm always here for you."
"Even though there seems to be no chick on this Earth to appreciate you, Willie, know that I'm always here for you."
by Lefty Palmer January 10, 2012
Get the appreciating williemug.