A nickname for Mormon underwear. this nickname is disliked by MormonsMormons who have been through the masonic 'Mormon endowment ceremony' wear special underwear which they call 'G's' or 'Garments'. every non-Mormon refers to them as 'magic underwear'.they are an ugly 2 piece set - like long johns and a t shirt - which are white, with white embroidered masonic symbols on the breast and 1 knee. The symbols represent a masonic square (L), a compass(^) and a level (-).Women wear bra and tights OVER the top of their magic underweardespite protestations from Mormons about the nickname for their underwear, every Mormon will have heard stories from fellow Mormons about how their garments have protected them from all sorts of harm - fire, gunshots, animal bites, accidental cuts, etcThis is the reason they are referred to as 'Magic'.basically, Mormons are wiling to ascribe magical status to their underwear, but get offended if anyone refers to them as such
Magic Underwear definition by Urban Dictionary
