A dried up crusty
penis. It would
look like a wrinkely pruney finger after you were in the bathtub too
long.
*Grandma was baking cookies one day when grandpa walked out of the bathroom stark naked. She exclaimed "By Golly! He has a
Twat Dog!"
**After being in the hot tub for quite some time,
Billy stepped out and was pantsed by a friend exposing his
Twat Dog to everyone at the party.