Williams students on Dining Services' full board plan receive 10 "guest meals" each semester that they may use to have anyone dine free at any meal. The guest may be any person but the cardholder, and the meal may be any meal at any dining hall, even special dinners.
"Guest meal" is used as a noun or a transitive verb, as in the following plausible conversation:
"Hey, how many guest meals do you have left?"
"I'm down to nine. Last week I guest mealed my buddy visiting from Wesleyan."