A lewd sexual act in which the male ejaculates on the face of his partner and continues to wipe the ejaculate from the face of said partner with his scrotum. In an ideal situation the male in question will have an exceptionally pungent yambag and will have neglected personal hygiene for days, preferably weeks. Optional: After said act is executed, the male may choose to dip his testicles in the mouth of his sexual companion. Thus avoiding unwanted residue on said yambag.
"Last night I was deep cleaning my grandma and gave her the ol' dirty rag"
"Jeff's so lucky that his wife doesn't make him shower before giving her a dirty rag"
"If i don't dip after a good dirty rag sometimes my ballsack gets all sticky"