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
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
"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" What is the definition of "beerma"?