A "cup of coffee" is a North American sports idiom for a short time spent by a minor league player at the major league level. The idea behind the term is that the player was only in the big leagues long enough to have a cup of coffee before being returned to the minors. The term originated in baseball and is extensively used in ice hockey, both of whose professional leagues utilize extensive farm systems; it is rarely used in basketball or American football since neither the NBA nor NFL have implemented a true farm system.
