DIRTY: The American Sign Language (ASL) sign for "dirty"

 

The sign for "dirty" holds the hand under the chin and wiggles the fingers.

DIRT:
This sign also means sand and/or soil. 
Hold your hands in front of you and rub your thumbs against your fingers as if feeling sand.

Sample sentence: YOUR BEDROOM DIRTY LITTLE-BIT?

Notes: 

See: DIRT

CLEAN

LIE

SMELL