1) It's occurs when someone is extremely excited to go to Six Flags and accidentally takes the "L" out of "Flags" and scoots in in-between the "S" and the "I" in Six.

2) Also used to describe those overly-macho men that almost start bawling before getting seated in a rollercoaster.
I saw the biggest Slix Fag at Six Flags, he cried for his mommy as he was waiting in line to board the roller coaster. I'm sick of all those Slix Fags.
by Gah089 August 16, 2008
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