Green’s Dictionary of Slang

(US) a greeting; thus greets, greetings.

1908		N.Y. Times 18 Sept. in Fleming Unforgettable Season (1981) 226: Ladiesgmn, this is Mr. Marquard come to pitch for you. Grant him a little greet.
1986		R. Merkin Zombie Jamboree 155: Greets...Didn’t know you were in the neighborhood [HDAS].