Even more than words, some phrases are irritating...

The words that rub me the wrong way when I hear or read them are often fine on their own, but when overused, or used badly in context, I shudder.

jug
has a vulgar connotation plus a jug-ugly sound

snack
sounds too cute by half, as if it were made up by a Mad Man

impacting, impactful
NOT REAL WORDS! use "affect" and variations thereof