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Hallucinogen persisting perception disorder. This is caused by taking a hallucinogen and some of the visuals never go away such as lights trailing and static but are not limited to this. These visuals are not severve but as the name implies are persistant and may never go away. This condition is not to be confused with flashbacks which are much more intense but do not last for extended periods. Some people actually enjoy this while it makes a select few commit suicide.
After eating an entire sheet of acid Bob had HPPD for the rest of his life.
by Bryce Glotfelty November 13, 2007
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Aug 5 Word of the Day
When your so pissed off from losing multiple amount of games that you play worse and worse till your so pissed you begin leaning over your keyboard screaming over every little mistake you make and complaining about gaming imbalances

(Common in Starcraft II)
"Why is johnny screaming at his computer"

"He lost a few games of Starcraft II, I think he is Tilting"
by Lashley1337 February 14, 2012
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