Term used to refer to an Overwatch player who is really experienced with the support hero Mercy and regularly plays her. Not to be mistaken with the one trick Mercy that probably has a hard time with the game. The Mercy main is now almost inexistent after all the changes the hero has been through (No more good Rez , no more exclusive good healing and no more POTG) . The Mercy main nowadays is most likely depressed and probably suicidal, for they can't (ever) satisfy their low-health teammates that are constantly in the need of healing, right when they were killed by a tank or a flanker, leading to great despair. They have every single skin the hero has gotten in the past, definitely have the voicelines "How barbaric" and "Someone call the whambulance " in their communication menu, have unbound their "Group up" key long ago but most importantly, they have bought the hero's golden staff.
by BrendaVerasoie February 02, 2020