shout your head offv exprverbal expression: Phrase with special meaning functioning as verb--for example, "put their heads together," "come to an end."
figurative, informal (rant, shout at length)
大叫 dà jiào
大喊大叫 dà hǎn dà jiào
He was shouting his head off but nobody heard him over the noise of the crowd. OK, I heard you - you don't have to shout your head off!