1. box and cox - Noun
2. box and cox - Verb
Box and Cox pl (plural only)
(UK, often attributively) Two people who occupy the same post or location in an alternating arrangement.
(transitive, intransitive, UK) To alternate with each other, often in the same post or location.
(transitive, intransitive, UK) To alternate between two people.
Source: en.wiktionary.org