crambo
Concise Oxford English Dictionary © 2008 Oxford University Press:
crambo/ˈkrambəʊ/
▶noun a game in which a player gives a word or line of verse to which other players must find a rhyme.
– origin C17: from earlier crambe ‘cabbage’, appar. from L. crambe repetita ‘cabbage served up again’, applied by the Roman satirist Juvenal to distasteful repetition.
'crambo' also found in these Oxford entries:

