Someone who insults.

plural of insulter

(rare) One who delivers an insult.

(rare) insulting

(business, colloquial) A consultant who is willing to criticise the organisation that they work for.

Capable of being insulted.

(rare, nonstandard) Insulting

plural of insultation

(uncountable) Action or form of speech deliberately intended to be rude; (countable) a particular act or statement having this effect.

(transitive) To be insensitive, insolent, or rude to (somebody); to affront or demean (someone).