foulthy 

when someone or something is foul with a sour odor and filthy dirty and greasy simultaneously.

hey B that bum is foulthy!

foulthy by Zooky August 24, 2014

fourthy 

A 'fourthy' is a partial erection. One might be apt to call it a half-boner, but this would be technically incorrect as a 'fourthy' occurs when a penis is more than 1/4th of the way up...hence, a fourthy.

It should be noted that fourthies (plural form) are apt to occur at inopportune times (such as in public places) and as such are typically surpressed to prevent a complete erection.

If a complete erection does take place, it would be said that 'he has a boner', not a 'fourthy'.

In most cases fourthies are largely unsightly however exceptions are known to occur.

OMG that milf gave me such a fourthy.

Joey's such a pussy, when she kissed him on the cheek he got a fourthy.

fourthy by tmkly3 October 30, 2007

Fulthy 

nasty, smelly white puss

If your mouth is clean, i can fulthy it up.

Fulthy by K to the I M February 4, 2009

Fourthy 

A insult used to describe a member of a 3 person squad (typically Battle Royale type games) that is so bad they are hurting their squad and helping the enemies win. Almost as if they were a fourth member of a enemy squad.

Just had a match with a fourthy that threw the game giving away our position.

Fourthy by Indirectllama March 25, 2021