noun
single man; bachelor; unmarried man
Colloquial and often jocular term for an unmarried man, borrowed from Korean. Used in casual conversation.
from Korean ch'onggak
彼はまだチョンガーで、結婚する気はないらしい。
He's still a bachelor and doesn't seem interested in getting married.
チョンガー同
Let's go out for drinks, just us single guys.
独身 is the standard, neutral term for 'unmarried' or 'single', while チョンガー is a casual, jocular loanword.
Borrowed from Korean 총각 (ch'onggak), meaning 'unmarried man' or 'bachelor'.