the term "to go all hayley" is a popular colloquialism in the south wales town of Maesteg. It is used to define a moment of super violent irrational maddness often occuring for no apparent reason obviously named after the woman in question.
Dude: man my girl went all Hayley again today
Other Dude: You should drop her silly ass
Man to girl: don't go all Hayley on me now woman!
Other Dude: You should drop her silly ass
Man to girl: don't go all Hayley on me now woman!
by Sausagio_Bacon April 21, 2008