Merakoon is a derogatory word meaning motherfucker and also jerk in Armenian. It can be used in different occasions; it can be used to swear at someone who you got angry at, just like in English; it is often used as an exclamation mostly by teenagers and jackass adults when they flip out for any reason; it is also used as an adjective for someone who is a jerk or a freak or a bootlicker. As a matter of fact, this shitty word, just like any other slang word, can be used versatilely.
merakoon...mered kekoonem means yo MOFO i am a fuck yo ass or
or for example if you get angry then you spontaneously say 'mera'koon meaning god damn it