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1.
when a person goes mental because of some thing small or insignificant
dude calm down, ur having a fanny attack!
by marsbarpants January 22, 2009
 
2.
when some is shouting about something they are having a fanny attck. or if they are getting over excited.
karina: sammi this is not on you put too much vodka in my drink, are you crazy??
Sammi: jezzz karina, calm down, dont have a fanny attack!!
by poppopcorn December 05, 2013