From WordNet (r) 2.0 (August 2003) [wn]:
kibosh
v : stop from happening or developing; "Block his election";
"Halt the process" [syn: stop, halt, block]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Kibosh \Ki"bosh\, n.
1. Nonsense; stuff; also, fashion; style. [Slang]
[Webster 1913 Suppl.]
2. Portland cement when thrown or blown into the recesses of
carved stonework to intensify the shadows.
To put the kibosh on, to dispose of; to squelch; to
terminate; put an end to; to do for. [Slang]
[Webster 1913 Suppl. +PJC]