Someone left yout cake out in the rain?
On lots of fora, this one included, you see certain typos or word substitution -- usually because many people are sight typists (as am I) as opposed to touch typists (my theory). This results in interesting and non-grammatical word usage:
series=serious (probably the brain doing a synonym replacement)
loose(r)=lose(r) -- finger stutter
There are others -- give ppl a break as they usually type WAY slower than they think so they make many mistakes (note the use of "ppl" in place of "people"). The emoticon analogy is probably the best -- shorthand saves valuable keystrokes.
"All you (anything) are belong to us" is a reference to a now, million plus internet-year story about a game that was made in japan and shipped out with a very funny translation, one spectacular phrase being "All you base are belong to us." The whole link is here:
http://www.planettribes.com/allyourbase/index.shtml
Hope that helps!
"Whazzup with, series?" Are hugh series?
(Pinging Hugh for a series take on the matter at hand)
(BTW we haven't even covered Møøse/Cheese yet on this thread!)