branch / stem / stalk / CL:根[gen1] / to block / to hinder / (neologism that evolved from 哏[gen2], initially in Taiwan, during the first decade of the 21st century) memorable creative idea (joke, catchphrase, meme, neologism, witty remark etc) / prominent feature of a creative work (punchline of a joke, trope in a drama, special ingredient in a dish, riff in a pop song etc)
羯鼓催花
jié gǔ cuī huā
drumming to make apricots flower, cf joke by Tang Emperor Xuanzhong 唐玄宗, playing the drum in apricot blossom
lit. the boot hits the floor (idiom) / fig. a much-anticipated, impactful development has finally occurred (an allusion to a joke from the 1950s in which a young man would take off a boot and throw it onto the floor, waking the old man sleeping downstairs who could then not get back to sleep until he had heard the second boot hit the floor)