ニッカalso: にっかーFreq.FrequencyTop 100,000Meanings1nounknickerbockersabbreviationAbbreviation of ニッカーボッカー; refers to loose-fitting knee-length trousers, often associated with golf or vintage fashion.See also: ニッカーボッカー彼かれはゴルフのとき、いつもニッカをはいている。He always wears knickerbockers when playing golf.