老师请问你是吃炫迈上课吗
[lăo shī qĭng wèn nĭ shì chī xuàn mài shàng kè ma]
Literally translates to 'Teacher, are you chewing Xianmeng (a chewing gum brand) while teaching?'. This could be a playful and slightly naughty remark towards someone's endless talking, perhaps referring to a gossipy person or someone who just won't stop lecturing. It is used humorously to indicate someone who talks a lot, often comparing the non-stop chatter with endless chewing gum use.