Mongalois is a word you would use to describe someone when they have been an idiot or can't answer a simple question. You might use this word to describe someone you don't like, but at the same time you could use for friendly banter as long as it doesn't escalate into a fight.
If a milkshake is shaken then surely it should be a milkshook
Terry your a mongaloid
A very idiotic, imbosilic person that also may be mentally retarded. Used for any insult. Offensive and no one knows why.
Mike: ay yo is that steve?
Pete: yeah man hes a right mongaloid.
Mike: bang on blud.
Someone whos a mongaloid but also is a spastic
Person 1: "Is that a spasticated mongaloid?"
Person 2: "No that's just thomas parker"