A word for describing the act of, or indeed the weapon of, sexual intercourse. 'Full faigan' is full penetrative sex, and the emphasis in this case should be in the 'FULL'.
'Half faigan' is used less often, and it's actual meaning can altered according to the circumstances, e.g. oral sex could be described as half faigan, as could mutual masturbation.
To 'faig' is to have sexual contact of some description.
The word 'faigan' can also be used to describe an erect penis.
"Look at the tits on that, I'd love to give her FULL faigan"
"Did you score last night?" "Yup, but she wouldn't put out, I only got half faigan"
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 FANTASTIC.
P1: I love Fai.
P2: Why?
P1: He made me Faigasm.
P2: lol
Once you have a faigasm, having a fangasm isn't as good.