Like the header says, SPOILERS for anyone who's managed to miss the ten million airings of "Depth Takes a Holiday". I sure haven't. Seems like every episode I tape turns out to be this one. :/
Anyway.
What the heck is a "tosser"?! I gather it's a derogatory British term, but what the heck does it mean? It's funny as hell, whatever it is. That scene cracks me up, but then I have a weak spot for Britishisms like "bullocks" and "shut ya gob!".
More seriously... I think the reason this episode fell flat for most folks wasn't simply that it had fantastical elements like holidays embodied as living magical people, but rather that it almost totally failed to use them in any meaningful way. Jake and Helen's little Cupid-triggered love fest was about it; otherwise, the entire plot -- someone enlists Daria's help to get someone else to return home; Quinn wears herself out trying to keep the parents apart -- could have been done with normal characters in a normal setting.
That said, there were a few fine moments -- mostly featuring Guy Fawkes Day. "But proms are for tossers!" "I'd probably say... BULLOCKS! But that's just a reflexive reaction." "Yeah, bullocks!" I love the way Jane's eyes light up when she says that. Shoot, I'd love to have seen the entire plot center around a bitter British punk rocker who somehow ends up at Lawndale High, and just cut the supernatural junk out entirely...