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: 自信満々 (じしんまんまん)
He started his presentation full of confidence.
A cocky attitude can sometimes rub people the wrong way.
Compound of 自信 (self-confidence) and たっぷり (adverb meaning 'plenty' or 'fully').