Baseball-itis Share definition Flag the definition of a girl crushing,flirting,liking or dating a baseball player in mhs (: Annex, Itzel, Thaymi, Priscilla, Leslie, Sharon, Gaby, etc...have an extreme case of baseball-itis. Baseball-itis by Baseballlover. March 4, 2009 0 0 Get merch Get the Baseball-itis mug. Buy Now — $32.95 See more merch