What You Do With Mouthwash
Puzzle 20 of Justin Timberlake Piece of Cake Pack
Question is: What You Do With Mouthwash
and the answer is: GARGLE
Word Meaning:
GARGLE — (intransitive) To clean one's mouth by holding water or some other liquid in the back of the mouth and blowing air out from the lungs.
Definitions from Wiktionary.