when something sucks so bad that its degree of sucking cannot be adequately described.
Originates from an adult swim message board conversation circa 2002 when a user, ragging on anime, made the statement "cuz anime is teh s uck." The space was necessary to circumvent message board filters.
Jimmy: I think I'm gonna watch Sarah Palin's Alaska on TLC tonight.
Carter: man, that show is teh s uck!