etymological terrorist 

A person who purposefully misuses a term or tries to appropriate a term based on historical meanings in order to advance a political agenda.

Terms some etymological terrorists have used in the past:

Isolationist to refer to non-interventionism
Classical libertarian to refer to communism
and more.

Bill Kristol is being an etymological terrorist when he calls people who don't want to always be involved in a war "isolationists" when in fact isolationism is what North Korea has and non-interventionism is what Switzerland has.

etymological terrorist by Gunguy September 6, 2016

Dirty Sanchez (etymological)

A Dirty Sanchez occurs when the passive partner (male or female) is sodomized and a coating of mucus/feces/lube remains on the shaft of the active partner's penis. He pulls out and the passive partner fellates him, drawing the member into his/her mouth through tightly pursed lips. This acts to squeegee the matter from the penis into a thin line or bead encircling the mouth. It forms a John Waters's moustache-like deposit on the recipient's upper lip like the moustache on a Mexican guy (e.g., from a 1930s movie; hence "Sanchez"), or John Waters. (A "Filthy Waters" is equally descriptive, but that term hasn't caught on perhaps due to its being a bit esoteric.)

I butt-fucked my girlfriend last night and she got the cutest little Dirty Sanchez when she sucked me clean. Thus the Dirty Sanchez (etymological) is an artifact of another act—it just happens; no fingers needed.

Dirty Sanchez (etymological) by Sterling Pfeffernüsse January 10, 2011

etymologician 

N. A person who reasons or performs logic based on etymology in the most pseudo-intellectual way possible. It has the vaudeville flavor of an unlearned man trying to appear to, or pretending to explain a discipline by dumbing the content down for his audience.

The homily was a snooze; the vicar was a total etymologician.

etymologician by boringalbinocrow January 1, 2024