Invective

invective \in-VEK-tiv\, noun:
1. An abusive expression or speech; a vehement verbal attack.
2. Insulting or abusive language.

adjective:
1. Of, relating to, or characterized by insult, abuse, or denunciatory language.

They all seemed to be in their usual mood of precarious good humour which could splinter at any moment into invective and menacing gesture.
-- Alice Thomas Ellis, Pillars of Gold