雑魚 ざこ
zako

Noun

1. small fish; small fry

この がわには雑魚 じゃこがたくさんいる。
kono kawaniwa zakoga takusan iru.
This river abounds in small fish.
Noun

2. (a) nobody; small fry; unimportant person

Noun

3. noob; weak player

Internet Slang
Noun

4. small penis; short dick

Derogatory
Other forms: