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1.
to slate = to cuss, to insult
a slate = an insult
He slated her good
by bi-atch August 24, 2002
 
2.
An online current events and culture magazine currently owned by the Washington Post. Slate features a wide variety of columns and articles (The Explainer, Dear Prudence, The Green Lantern) as well as a number of blogs such as The XX Factor and Kausfiles. Slate is known for its humorous, often irreverent style, and has acknowledged its own liberal bias and contrarian tendencies. Often highlights events and legislation which are largely passed over by the mainstream newsmedia. Originally adopted a "liberal hawk" stance on the US invasion of Iraq, but has since become increasingly critical of the occupation's management. Slate updates continuously with new articles and features added throughout the week.
I read a great article on Slate the other day about Parliament and the afronaut movement.
by Cicero's Assassin July 10, 2008
 
3.
A hard metamorphic rock,formed from the sedimentary shale. It progresses through to phyllite, schist, and gneiss.
Slate roof tiles
by The Great Bonzo March 03, 2004
 
4.
A male slag.
Break the slates for Christ's sake, male slags...
by Bargain Bill April 02, 2011
 
5.
a derivative or lazy way to say see-ya-later or later or lates

also, some Corp stole the word and made the name into pants. dikks!
I'm audi.....slates!
by Mark T January 25, 2005
 
6.
Pejorative for an argument made for sport that is patently untrue, in the manner of Slate.com.

This might sound Slate, but I think China's accumulation of US debt is actually good for the American economy in the long term.

The Oklahoma City Thunder might have won a few games without Kevin Durant, but to suggest they're better off without him is Slate.
by Constable Echelon March 11, 2009
 
7.
a combination of "Stupid", "Loser", and "Tate"
Tate and Lucy at the same time: we should go to hershey park!!!
Tate: jinx!! knock on wood!...bang...bang...bang...OWWW!!!
Kanika: gosh Tate, don't be such a slate!
by Lucinda Rolando May 19, 2008