Alternate ways of spelling: Faygasm, Fyegasm.
To have a fangasm over Fai D. Fluorite, from
Tsubasa Reservoir Chronicles, a series produced by CLAMP. CLAMP are also the creators of CardCaptor
Sakura, Chobits and xxxHolic.
Not uncommon because
the character Fai D. Fluorite is so extremely sweet, hot, sexy, angsty, and all around