An impairment of the ability to let go of the SHIFT key on a standard keyboard. This condition can be acute or accidental.
Acute SHIFTLEXIA examples:

"WTF! WHY CAN'T YOU JUST STOP TALKING ABOUT HOW YOU FEEL?!? NO ONE REALLY CARES ABOUT ANYTHING YOU HAVE TO SAY SO JUST SHUT YOUR MOUTH."

Accidental shiftlexia examples:

"You n))b" instead of "You n00b"
by Joshua 'Z' Hernandez January 9, 2008
Get the shiftlexia mug.