Top Definition
an acronym for "Back Yard League", an amatuer sports league commonly formed by high school boy who cosider themselves "a band of brothers". Activities range from hockey to partying.
Guy #1: "Hey bro. You going to play hockey later?"

Guy #2: "Nah man. Sage didn't invite me. He says I'm not in the BYL."

Guy#1: "Why am I talking to you again?"

Guy #2: "I was at the party at Ernies."
by 1bigolnut March 24, 2010
4 Words related to BYL

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