A deregotary name for the emo-shite band Panic! At The Disco in which the "!" is read as "exclamation mark".
It originated from the trend of purposefully mispronouncing the pretentious names of shitty emo,
NME and
scene bands - in order to piss off their fans.
See also iforward russia exlclamation mark and
Guile-mots.