sure of (oneself)

sure of (oneself)

Very self-confident. You can't go into that interview wondering if you're good enough for the job—if you're sure of yourself, the interviewer will be sure of you, too. A: "Well, Tammy's very sure of himself, isn't she?" B: "Yeah, we've never needed to worry about her succeeding in life."
See also: of, sure
Farlex Dictionary of Idioms.

sure of oneself

Self-confident, as in Now that Mary's graduated she's much more sure of herself. This expression uses sure in the sense of "confident" or "secure," a usage dating from the mid-1400s.
See also: of, sure
The American Heritage® Dictionary of Idioms by Christine Ammer.

ˈsure of yourself

(sometimes disapproving) very confident: She seems very sure of herself.
See also: of, sure
Farlex Partner Idioms Dictionary
See also:
  • sure of oneself
  • sure of yourself
  • standing
  • cross (one's) t's
  • cross t's
  • sure
  • dot (one's) i's
  • dot i's
  • no matter how the dice fall
  • dot the i's and cross the t's