Muckelspäck

Is when your best friend does something silly or stupid to an inanimate object or when a friend does something to you that has offended you. Can also be used as an insult.

Man1 "That ball is so stupid it does not do what I say."

Man2 "Wow you are such a muckelspäck."

Man1 "Stfu you are such a pussy

Man2 "Better watch your mouth or im gonna muckelspäcka you"