Self-deprecating (adjective)

Being critical or dismissive of oneself.

Origin:

Combination of self and deprecating, meaning critical or dismissive of oneself.

Examples:

1. He had a self-deprecating sense of humor that endeared him to others.
2. She was self-deprecating about her own abilities.
3. He was always self-deprecating about his own accomplishments.
4. The self-deprecating way she talked about herself made others uncomfortable.
5. The self-deprecating jokes he made about himself hid his true feelings of insecurity.