吹牛

to talk big / to shoot off one's mouth / to chat (dialect)

to blow / to play a wind instrument / to blast / to puff / to boast / to brag / to end in failure / to fall through

ox / cow / bull / CL:條|条[tiao2],頭|头[tou2] / newton (abbr. for 牛頓|牛顿[niu2 dun4]) / (slang) awesome