The slang(?) phrase "乾掉了"
I think is a slang in Taiwan

乾掉了 mean something is turning into boring(usually use after someone say a not funny joke) or the situation that people don't know what to say or react to it

ex1:

You just meet someone new to you

after greeting, you don't know what to say to him, and so does he

this embarrassed situation can be said "乾掉了"

ex2:

you are holding a show and after talking a joke

you are waiting crowd to laught

but there's no one laughing, and a embarrassed silence appear

you can say "this show 乾掉了"