Underlip (noun)

The lower lip of the human face.

Origin:

The word "underlip" is derived from the word "under" and "lip" which refers to the lower lip of the human face.

Examples:

1. She pouted her underlip when he refused to give her what she wanted.
2. He bit his underlip nervously as he waited for her to arrive.
3. The baby's underlip quivered before he started to cry.
4. She applied lipstick to her underlip before applying it to her upper lip.
5. He had a small cut on his underlip from where he had accidentally bitten it.