A mental or emotional climax obtained by an obsessive fan of a series or other such thing. Normally happening in the presence of fanfiction or doujinshi, and often experienced by the female fans. After a fangasm, a decline in sexual mentality occurs, similar to the down period after a real orgasm.
1."That CloudxSephiroth doujin made me fangasm~!!"
2."I fangasmed when I saw Vic Mignogna at A-Kon last year!"