ガチで

adverb

seriously; for real; truly

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。

  That story was truly interesting.