Talk about how to respond tactfully when someone comments that they want to vomit.

When you say that a person wants to throw up, it means that he doesn't agree with what you said, or he thinks what you said is too sour, so he wants to throw up. So you can answer him like this: hahaha, if it really makes you want to vomit, then I have achieved my goal. Then give him a witty expression. After all, everyone's speech is targeted. Do not adapt, may not comment, may also be absent. There's no need to make such an expression. So you should answer him like this and let him understand your intention.