牛掰

牛掰	niú bāi	see 牛屄 (euphemistic synonym of 牛屄)
牛	Niú	surname Niu
牛	niú	ox / cow / bull / CL:条,头 / newton (abbr. for 牛顿) / (slang) awesome
掰	bāi	to break off or break open sth with one's hands / (fig.) to break off (a relationship)