godan verb (-ru)
joke; crack a joke; say something funny
Casual slang verb meaning to make a joke or say something humorous, often in a lighthearted or playful context. Derived from ギャグ (gag).
See also: ギャグ
彼はいつもギャグってばかりいる。
He's always cracking jokes.
会議中にギャグらない
Please don't joke around during the meeting.