whiffler

Etymology

From whiffle + -er.

whiffler means one who whiffles, or frequently changes their course or opinion. Lexicurio rates it Sui generis — a strength score of 87 out of 100.

Why this word is great

WHIFFLER — [Noun] One who frequently changes opinions or course; an evasive arguer or trifler. From whiffle (meaning to blow in gusts, vacillate, or trifle) + -er (agent noun suffix). Unlike a vacillator, who is mired in private indecision, or an equivocator, who obscures to deceive, a whiffler performs a public, almost sportive evasion. He is the pundit whose conviction shifts with the morning's headlines, the friend whose promised visit is perpetually postponed by a new enthusiasm, the critic who dismantles a theory with a smirk but offers nothing in its place—a master of the insubstantial, leaving behind only the faintest scent of a point, carried off on the next capricious draft. It is the melancholy spectacle of a mind that mistakes motion for thought.

noun

One who whiffles, or frequently changes their course or opinion.
One who argues evasively; a trifler.“Every Whiffler in a Laced Coat, who frequents the Chocolate-Houſe, and is able to ſpell the Title of a Pamphlet, ſhall Talk of the Conſtitution with as much Plauſibility as this very Solemn Writer, and with as good a Grace blame the Clergy for medling with Politicks which they do not underſtand.”
One who plays on a whiffle; a fifer or piper.
An officer who went before a procession to clear the way, by blowing a horn or otherwise; hence, any person who marched at the head of a procession; a harbinger.“[...] Men, Wiues and Boyes, / Whoſe ſhouts & claps out-voyce the deep-mouth'd Sea, / Which like a mightie Whiffler 'fore the King, / Seems to prepare his way: [...]”
The goldeneye (duck).