Underbeard 

Facial hair that grows on the underside of the chin. This style of beard is frequently sported by the overweight, in which case it technically resides on their second chin.

"Kids, take a page from the Underbeard King and get rid of your neckal hair,
`cause you're lookin' like Chewbacca did a face-plant into Nair."

~ excerpt from the traditional Ballad Of The Underbeard

Underbeard by forkbomb October 24, 2008

underbeard 

the secret for quiz bowl success.

We would have never won that tournament if it weren't for that underbeard.

underbeard by Moon2E February 12, 2010

underbeard 

Pubis hair (those around and above the vagina)

Horny pop babe flashes nice bit of underbeard.

underbeard by Vincent Vega September 10, 2004

poor waif in his underwear 

A person who blows their cover as a Kremlin propagandist.

“Seymour Hersh was a poor waif in his underwear when quoting his source, a supposed “anonymous US official”, who used the russian idiom “waif in his underwear”, which until then was not used in English.”

poor waif in his underwear by atomicapproach July 28, 2023

a poor waif in his underwear 

A pro-Russian journalist or Russian/Kremlin official who attempts to pass off fake quotes as real things said by government or military officials in Western countries but are clearly fake due to translated Russian phrases, strange wording, words being used in strange or unnatural ways, etc.

The phrase comes from an article written by Seymour Kersh, a pro-Russian journalist. In the article, he claimed an anonymous American official called President Zelenskyy of Ukraine 'a poor waif in his underwear'. However, the term 'waif' is extremely uncommon in American English, and the whole phrase was a Russian meme until the publishing of the article.

Seymour Hersh was a poor waif in his underwear when quoting his source, a supposed 'anonymous US official', who used the Russian idiom 'a poor waif in his underwear', which until then was not used in English.

Pro-Kremlin social media users were floundering like poor waifs in their underwear to dismiss the initial use of 'a poor waif in his underwear' as a mere translation issue without explaining why there would be a translation issue between a US journalist and a US official.

a poor waif in his underwear by True Squatch July 28, 2023

a poor waif in his underwear 

a person who has blown their cover as a Kremlin propagandist, especially when it is unclear they even knew they were one

Seymour Hersh was a poor waif in his underwear when quoting his source, a supposed “anonymous US official”, who used the russian idiom “waif in his underwear”, which until then was not used in English.

a poor waif in his underwear by 504jdw July 28, 2023

Underwear Streaks 

When you shit yourself, or fart loudly enough that a bit of shit sprays out and stains your underwear with brown streaks.

Dude I just loud farted and it left me with underwear streaks. I may just throw them away at this point.

Underwear Streaks by Soapey August 3, 2019