An expression used by a person who is feeling pressure in a social situation by either a specific individual or a group of people. This specific individual or group of people are usually trying to get the person who uses the expression to do something that they don't want to do.

Referring to the heavy unfashionable winter jacket and patterned mittens Sanders wore to the inauguration of Joe Biden.

To tell someone to stop bugging you or if someones on your back.

used when someone is being annoyed

I phrase that is said to someone who is sitting on your nuts.