日2007
Kyotou-O
Giant-head O ASCII horror meme
Meaning
It is a Japanese ASCII shock meme about a giant floating head shaped like O.
Origin
It spread in late-2000s copy-pasta and horror threads on 2channel.
How it's used
Use it for sudden giant-face ASCII spam and related net-legend jokes.
Example
Someone flooded the thread with Kyotou-O and scared everyone away.