Idioms: Full of Oneself | Sure of Oneself

Guess the meaning of this expression:  full of oneself. Derrrick is so full of  

himself. He thinks that his ideas  are better than anyone else's.

The answer is C. Conceited, like arrogant. To be  

full of oneself means they have a  really high opinion of themselves.

Sam and Woody are trying desperately to kiss me. 

Boy, someone's a little  full of herself, isn't she? 

You are so full of yourself. A related  expression is "to be sure of oneself,"  

and it's not necessarily bad. It could mean  you're confident, but it could also mean you're  

overconfident. Too confident. You're either  very impatient or extremely sure of yourself.