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1.
A chav hat where the peak has to be completely flat, otherwise the chav will "Merk" you if you bend it. The sticker of "New Era" is often left on most of them, if not all of them.
Chav 1: Nah mate, check dat flat peak!
Chav 2: Man dats nuthin, I've got an NY one at home.
by Baggaz January 05, 2008
 
2.
A condom which you often use when having sexual intercourse
' have you got a flat peak '
' no have you '
by Kaytiie March 09, 2008