The number one in place of an exclamation point at the end of a sentence.

This occurs when someone is "screaming" in all caps but forgets to use shift for the exclamation mark.

Writing in all caps and using the number one for emphasis.
COMPUTER BY OFFICES. SLUGGISH AND STUPID111

I was so angry I used screaming ones.

YOU SUCK111
by pkwatz March 22, 2010
Get the Screaming Ones mug.
n. Waste material discharged from the anus after a heavy nights drinking and a hot curry. So named by the horrible screaming that follows the sun hot monster that bursts from your behind.
Jesus wept! That screaming black one felt like I was having my anus broiled.
by Captain Blackheart September 29, 2005
Get the Screaming black one mug.