A word used to describe that 'drone of dread' often heard in movies or horror media. Used by Markiplier in his recent video on the horror game "From the Darkness" to describe the noise playing in the background.
That music is awfully.. shwumbly.
Markiplier's video, "ABSOLUTELY TERRIFYING | From the Darkness" at 31:09
"Help! That shwug just stole my car!"
"The big shwug that hangs out by the liquor store on Martin Luther King sells the bomb shit."
"There sure are a lot of shwugs in the U.S. penal system."