It is a cross between calling someone a Clown and a Donkey. Used in a negative way towards someone so stupid you can't decide whether to call them a Fuckin' Clown or a Fuckin' Donkey.
That fuckin' guy's such a clonkey. Plural - Her and her whole crew are a bunch of clonkies.
a call of duty feeder most well known for his 6 pack abs and monumental amount of swag. many people are jealous of his overall greatness as a person and he is just a cool person!!