noun
biker gang; group of reckless-driving delinquents
Colloquial term for a 暴走族 (bōsōzoku) group or its members. Can refer to the gang itself or an individual member. Strongly associated with youth subculture and illegal street racing.
See also: 暴走族 (ぼうそうぞく)
あの交差点は夜になるとゾッキーが集まる。
That intersection is where the biker gang gathers at night.
彼は若いころゾッキーだったらしい。
Apparently he was a biker gang member when he was young.