An at first accidental, now deliberate, mispronunciation of "sick bay." "Sicks" for sick people, possible origin of the nounification of adjectives, leading to "Olds" and "Federations".

Adam and Ben have even taken to editing sickbay-related audio clips from the show to mispronounce the word. May also be heard as "Six Bay" by viewers,

Originated in Ep:47 Terrible, Terrible Clip Show (S2E22)