自じ信しんたっぷり

na-adjective, adverb

confident; full of confidence; cocky; full of oneself

Describes a person or attitude brimming with confidence, ranging from positive self-assurance to negative arrogance. Often used with 様子, 態度, or 表情.

See also: 自信満満 (じしんまんまん)

• 彼かれは自じ信しんたっぷりにプレゼンを始はじめた。

  He started his presentation full of confidence.

• 自じ信しんたっぷりの態たい度どが時ときに反はん感かんを買かうこともある。

  A cocky attitude can sometimes rub people the wrong way.