1 definition by K Floss

Undertongue

1. (n): Area on the bottom of the tongue where the tongue attaches to the rest of the mouth. (You know what i'm talking about- it's all veiny and full of saliva)

Girl: "I was picking my teeth with a toothpick and I slipped and stabbed my undertongue today!"

Guy: "Wow. You impaled your undertongue? Gross."

by K Floss December 6, 2009