ㄹ수록 웃기다

funnier the more you think

-(으)ㄹ수록 means "the more X, the more so," and with 웃기다 it says a joke keeps growing on you rather than fading. The stock version is 생각할수록 웃기다, which appears in several lines on its own (생각할수록 웃기네, (생각할수록 웃김)), and the same frame takes other verbs: [상상할수록 웃긴 명품백 입장], [다닐수록 웃기는 여행], 말할수록 웃긴데. Most of these are on-screen captions an editor put over a moment that kept landing.

Register: casual; mostly caption text