From the Cockney Slang word 'septic' which was short for septic tank...yank.

So to say that someone was anti-septic means anti-american...Listerine.

Clear as mud that one!
That Osama Bin Laden is a right old Listerine!
by Afroken November 14, 2003
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the act of dipping your balls into someones throat so they are in a sense "gargling" them like mouthwash
Should I listerine Logan while he's sleeping?
by Nagol_Notxap August 2, 2009
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Listerine infection refers to a medical condition caused by the excessive use of listerine or similar antiseptic solutions used to maintain oral hygiene. Its symptoms include a rise in temperature, walking sideways, stalking your exes new girlfriend, a bitter taste in your mouth, cardiac insufficiency and apoplectic stroke like symptoms. If you notice any of the before mention symptoms immediately stream “Becky’s so hot” by Fletcher and presave her debut album “girl of my dreams”.
Listerine infection is a bad taste - Fletcher

I heard Cari has a bad listerine infection
by Fletcherssohot July 28, 2022
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The act of puttin a tiny amount of listerine into your spitter to eliminate the old spitter stank
*pulls out yesterdays vitamin water spitter* "yo don my spitter smells like the time i gave that homeless man a rimjob"
"oh man cip, just empty it out and throw some listerine in there,i call it the Listerine Spitter.. or the LS for short, smells like heaven for days :) "

to our skoal brothers.. enjoy:) -pattented cip and donaldson of basking ridge
by Cip and Donaldson August 27, 2008
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An actual challenge, not a prank, to see how long one can withstand swishing a full shot (the cup attached on the bottle) of Listerine - *Cool Mint* inside their mouth.

This is usually very difficult to do for most people, given the fact that the formula for most Listerine products gives a burning sensation that damages the sensitive tissue inside your mouth.

But on the plus side, the victim of the Listerine Challenge gets a cleaner, fresher, mouth.

**this is in no way promoting the products of Listerine, or any dentists.

See also: cinnamon challenge
Friend 1: "Hey, you want to try the Listerine Challenge?"

Friend 2: "Okay, what do I do?"

Friend 1: "Swish this small cup full of Listerine - Cool Mint, in your mouth for 30 seconds, and you'll get 10$ dollars."

Friend 2: "Challenge accepted."

10 seconds later...

Friend 2: "Fuuuuuuuuuuu!!1!!"
by Poop The Human August 28, 2012
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The heavy dose of Listerine that some hapless drunks must indulge before going to work in order to cover up the distillery odour they carry from drinking all night.
Poor Patrick thought his Listerine coffee would cover up his showing up to work plastered at 9:45 a.m., but his listlessness and red eyes gave him away.
by Circushead July 10, 2006
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The OG mouth mash capable of washing away every word, kiss, and germ out of your mouth.
"I kissed an ugly girl at school on accident"

"Get the Brown Listerine"
by Learn the sauce August 5, 2020
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