Construct:	Noun
Definition:	To put an end to something, to terminate or stymie.
Use:	This will put the kybosh on everything. This will put an end to everything (scheme, etc). (Murphy)
Derivation:	Irish 'Caidhp Báis' - the death cap, hence an end and note spelling. (Ó h-Éaluithe) Note Irish 'Caidhp' - a coif. (Dinneen) and 'Caidhp Báis' - death cap (botany). (Ó Domhnaill) and 'Kibosh' - nonsense, put an end to, finally dispose of (19th century, origin unknown). (Concise Oxford Dictionary) and 'Kybosh' - some sort of difficulty or 'fix'. "He put the kibosh on him - he defeated him". (Joyce) 'Kibosh' as above (military, First World War, Put the kibosh on the Kaiser). Perhaps Yiddish 'Kyebosh' or 'Kibosh' - eighteen pence. (Partridge) and note 'Kybosh' - wages, money (Cornwall). (Wright) and see "The woman had put the kibosh on things with her dastardly threats." (O'Mahony)