信不信我一口盐汽水喷死你
[xìn bù xìn wŏ yī kŏu yán qì shuĭ pēn sĭ nĭ]
Translating to something quite uncivilized as if threatening 'see if you believe me if I can kill you by spraying soda water'. It is used in a teasing manner without true harmful intention, showing an amusing character sometimes when joking with others.