Bragging, boasting, and empty promise.

From 19th c. poker players - someone who is claiming to have a five card flush, when actuality they only have four cards. NOT someone who is so full of shit that you need four flushes to send them down the toilet.
In the movie "The Great Waldo Pepper" Robert Redford's character was exposed as a "Four Flusher" for claiming to have fought a German WWI ace, when he actually had not.
by Godzilla1960 May 26, 2014
a person who makes false or pretentious claims; bluffer
Jane thinks she has everything, but all she is is a four flusher.
by jeteye June 28, 2010
A person who is such a giant turd that s/he would take multiple flushes to get rid of.
The only way to get rid of of that four flusher Todd is to break him up into little pieces with the handle of the toilet plunger before you flush.
by No Stinking Badges August 30, 2015
1. Somebody who is obviously lying, posturing, idly boasting, who does not have the goods; one who is 'so full of shit' that it would take four flushes during the movement to clear the bowl.

Originally from game of poker, c.1880, one who bluffs that they have five cards in a flush when they only hold four.
Steve: Phil doesn't really have a summer house?
Bob: No, he's living with his parents. He's a lying, four-flushing sack of shit.
by hactar May 2, 2003
this is an awesome word and apt. sadly my proposal double stalling stalled and would be a great part of the constellation of shit for brains. sometimes if i think someone is full of shit, i give them some shit and if they can't take any shit i conclude they are full of shit, a four flusher.
"The man is incompetent, he's a fourflusherfour flusher, a publicity-seeker, an unethical competitor, and he has none of the instincts of a gentleman." page three, Perry mason solves "the case of the reluctant model" by erle Stanley Gardner
by bonarues July 27, 2019