also: がばまん · ガバまん · がばマン
noun
loose vagina; woman with a loose vagina
Vulgar slang abbreviation of ガバガバマンコ. Used derogatorily to refer to a woman perceived as having a loose vagina, or to the vagina itself. Extremely offensive; not used in polite or formal contexts.
ネットのスラングで「ガバマン」って言葉を見たけど、意味がわからなかった。
I saw the word 'gabaman' in internet slang, but I didn't understand what it meant.
あの掲示板では、女性を「ガバマン」呼ばわりするような書き込みが問題になった。
On that forum, posts calling women 'gabaman' became a problem.