I found many native speakers using "Don,t trip" instead of using "Don,t worry". Is it polite to use everywhere? I would be greatfull if anyone help with valued suggestion.
This example sounds like slang to me. When I say “slang” I mean language that is used by a specific subculture or group of people.
To answer your question, it wouldn’t be considered polite by everyone. For example, if I said it to my grandmother she wouldn’t know what I was talking about. However, if I said it to a 22 year old girl she would understand me immediately.