gnash

no doubt he is gnashing his teeth in rage.

毫无疑问正气得咬牙切齿。

He one gnash one's teeth bought 500 flesh to use chickling.

咬牙买500只肉用鸡。

He’ll be gnashing his teeth when he hears that we lost the contract.

要是听说我这份合同，准会气得咬牙切齿。

gnash:用力地磨牙，啮：用力地将两个平面在起摩擦，磨（牙）：Slang To rotate the pelvis erotically, as in the manner of a stripteaser.【俚语】 淫荡地晃动：卖弄色相地摇摆臀部，如脱衣舞者样Slang An erotic rotation of the pelvis.

（grind：To rub (two surfaces) together harshly;