slay

The expression You really slay me! dates back to American English of the 1920s so it is fairly traditional slang these days.  You might even seem a bit quaint if you used it.  But there is a new way in which slay is being used adjectivally, as in He is so slay! That movie was slay!  Or as an interjection.  What do you think of the movie? Slay!

Slay in this instance means ‘really, really good’.  So if you think you are sick of awesome, move on to slay.

Turning a verb directly into an adjective is not something the English language does every day of the week.  The only other example I could find is chill. The verb sense is ‘to be cool with, relaxed about’ and this leads to chill as an adjective meaning ‘fashionable’ and then simply ‘excellent’.