Someone who screws up the simplest of tasks out of selfishness or ignorance, and ruins a good time for everyone.
That asshole Charles is such an onion peel. All he had to do was follow us to the party and he ended up knocking on the next door neighbors house in the middle of the night. The cops got called and kicked us all out.
An onion chopper is a person who constantly posts emotional, tear-jerker type videos or articles on social media, usually for cheap likes or upvotes. Term comes from people commenting “Someone’s chopping onions over here...”
Did you see Karen’s post about the dog who died saving their master from a fire? She’s such an onion chopper.