People who sermonize on and on, so that you want to fucking kill them.

Like people saying "Smoking kills. Healthy life-style rules. Blah-blah-blah..."

Actually named after Dale Carnegie – a famous writer and lecturer, who developed a lot of self-improvement courses and shit.
Anyone can become one of "Dale Carnegie people" if they start to moralize very annoyingly.
Dale Carnegie himself.
by Jared Cash February 20, 2014
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