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2.
the religious ceremony of fucking mooses every day
George-"Dude, why did you buy a moose?"
Bob-"It's for this new religion of keithism! You should join!"
by Brett and Nick April 27, 2008
 
1.
Sayings or other oddities expressed by Keith Hernandez (the former 1st baseman for the New York Mets).
-"That's an el bomberoni!"
-Well that's a Keithism; if I ever heard one.
by 5Mets7 May 22, 2011