1. n. A person who has such a low opinion of him/her self that he/she is afraid to express ideas, opinions, or even to talk to others for fear of making a fool of him/herself.
2. A person who apologizes for everything that he/she does.
Cathie is such an egophobe that she practically apologizes for being alive.
Maria has good ideas, but the fact that she is an egophobe keeps her from voicing them in staff meetings.
egophobic (adj.) egophobically (adv.) egophobia (n)