To be sleighed is to be immeasurably drunk on
Christmas Eve, so much so that you are either still drunk
Christmas Day or are massively hung over. The same as "wasted" or "shit-faced" but used specifically on the Christmas Holiday. This term can also be used post-Christmas if one is wasted
Christmas Day and continues into Boxing Day.
This is often seen in "mall Santas" after they finish thier final day on the 24th.
Guy 1: "Whoa, did you see that
mall santa tossing his guts under that tree?"
Guy 2: "Yeah, he's totally sleighed!"
Example 2Santa: Whooaaa there Rudolph, I said leeeeft.... hold up I gotta
ho ho ho hurl! *blargh*
Rudolph: Good graces Santa! Your F*cking Sleighed!