1 definition by XCobra427X

An unspoken rule of hospitality stating that should a host provide a guest with spiritus beverage (primarily beer), they shall return the favor later on.

similar to the the Hindu/Buddhist belief of karma but only in regards to spiritus beverages.
"Tim had built up enough beerma with Mat that he needn't worry about stopping by the liquor store before going to Mat's place."
by XCobra427X October 18, 2004
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