Noun
(historical) A mid-sized horse used to pull a bus.
(US) Assistant waiter; one who busses.
Source: en.wiktionary.orgHe figures he can run the place with around 10 people at a time: bartender, barkeep, two servers, busser, chef, three cooks, perhaps one more. Source: Internet
Thanks to Chrissy, the Chef, and our busser! Source: Internet