a word describing anything that is extremely fantastic, to the point of almost being orgasmic
Tina: look at that guys butt!

Henrietta: I know, thats the most fantasmo butt I've ever seen...
by sleepy_mexican March 12, 2008
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A commentator for his own Modern Warfare 2 gameplay on youtube. He is as funny as shit and refers to his viewers and fans as 'his nuggets.' He plays free-for-all and is famous for his 'killstreakless' nuke videos.
Mister Fantasmo-"Whats up my nuggets! Mister Fantasmo here."
by xhaphanus June 28, 2010
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