It took me the better part of a week to figure out what Slate's new aggregation feature's name was supposed to mean. Is it the superlative form of Slate (as in slate, slater, slatest)? A strangely spelled contraction of "Slate list"? An attempt to piggyback on the popularity (?) of Gothamist, Phillyist, and other similarly named blogs?
It finally hit me that it's a combination of "Slate" and "latest." At least I think it is.