When you're coming down from being high off of drugs, or you're not feeling the full potential of your high, you take some more (drugs) for a "woo boost"!
Frank: "Man, I'm not feeling this ecstasy that well..."
Ted: "Oh, I'm sorry man! Do you need a little woo boost to help you out?"
-or-
Frank: "I'm coming down already."
Ted: "That's okay, just take this woo boost."