ガチでMeanings1adverbseriously; for real; trulyslang›Slang adverb used to emphasize that something is done genuinely, earnestly, or without joking. Often used in casual conversation among young people.See also: がちんこガチでやばいことになった。Things got seriously bad.あの話はなし、ガチで面おも白しろかったよ。
