informal
¦ pronoun nothing.
¦ exclamation
1. expressing denial or refusal.
2. Brit. dated used as a warning that a person in authority is approaching. [perh. from the obs. phr. keep nix 'to watch, guard'.]
¦ verb chiefly N. Amer. put an end to; cancel: he nixed the deal.
Origin
C18: from Ger., colloq. var. of nichts 'nothing'.