What to do when you suck at comebacks?do you have any good ones?

I need better comebacks lol, what to do?
Update: i have self confidence lol, but ill just be like ahh..nothing. im not that witty i must say, like i love those kinda things like " oh i hope this makes you sleep better at night" like that lol
Update 2: i do this just for fun, no ones insulting me, but me and my friends;s dad do this for fun, and he beats me everytime!!
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