Don't act like you're overly confident or cocky, but aim to please on all counts.
It's fun, he said with a cocky grin.
Let's say you are on a first date with a person who is showing signs that he/she is not attracted to you, such as putting up barriers, no hint of mirroring, assuming the posture of a cocky individual trying to impress other people.
Being a cocky little devil, he challenged my bossy little collie bitch, who immediately put him in his place.