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The term FOSA is an abbreviation of the phrase 'Full Of Shit Arsehole', phonetically it sounds like the word LOSER but with an 'F' in place of the 'L'. The term usually applies to males rather than females. Favorite past times of the FOSA include, lying to girls, dumping nice girls for skank ass hoes and going to spearmint rhino. See definitions below; 1. An arrogant, self centered male who women can't seem to get enough of. Usually seen talkin' smack to his buddies about other chicks he's boned. 2. An guy from 'out of town' or 'overseas' that's around for a good time not a long time. Often English backpackers or anyone 'couch surfing' is a FOSA. 3. A guy who drives a shit hot car that his parents paid for while talking on his iPhone or Blackberry. He almost runs over pedestrians due to fixing his hair in the rear-view and cuts other motorists off if they are driving inferior cars. This FOSA more than likely went to Scotch College and will definitely be at Baroque House tonight.
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