The 3rd word in a series of replacement swear words. After FSCK became the ridiculous swear word, this became the new one.
It's named after Sailor Fisk, a ship captain in the game Ragnarok Online.
Scoots: LoRes, let's go kill some pirates!
LoRes: K
Scoots: U"RE ggoing to=love this guy's name... Tltalk to the sailor and have= him teleport = U'rE!1
LoRes: ...Sailor Fisk!? LAWLZORCOPTERS! FSCK that, I'm saying this from now on!