A particular gay sub group defined by it's overdeveloped muscular physiques. As a group they can be exceptionally camp and effeminate.
Gay men obsessed with achieving the perfect body.
Muscle Marys often spend hours at the gym lifting weights to secure a good physique.
Gay men, usually tanned, big (disco tits), stork legs who frequent discos and especially circuit parties without shirts, dazed on various drugs. Sort of what happens to a (twink) when they are no longer malnourished, are older than 23 and no-longer working in retail.
Everyone knows Kip and Blair as a fierce duo of muscle marys because of their flawless tans, huge pectorals, scrawny bird legs and asses that look like sad, sagging and tattered venetian blinds after a hurricane.
A muscle guy (both straight and gay) who knows and sings, often in private, all the words to Christian Aguilera's "Beautiful". Broadway musicals, Liza Minelli CDs and his steroid set-up are among the stuff he'll save in a fire.
Will is such a Muscle Mary he practices body building competition poses while lip synching Cher!