infatuated with profanity ...1689 nonce word obs.
apparently from profane, with word-play on fanatic
FIRST DOCUMENTED USE
1689 - see Example below
"...What a strange Prophanatick Age is this, When Truth is scorn'd, and falshood courted is?"
From: The Character of a Good Commander,
By: Thomas Plunket, 1689
• A New English Dictionary on Historical Principles,
James Murray, 1887-1933