A person who refuses to taste food or specifically meat, before drowning it in Ketchup.
An ignorant individual who will not try anything new or refuses to try a new concept.
An annoying individual who stalks females.
Who' this dumbjack? (A ridiculous looking individual who is assumed to be a stalker.)
Can you please pass the Ketchup? (This statement is in the first person, where the individual is at a establishment where fine meats are served in which case a pointless amount of ketchup is dumped onto ones main course.)
Oh my god, is dumbjack doing it again? (Third person statement where the same situation is as above but from anothers perspective.