A word used to portray not believeing something. Its mainly used by 'weeeeeell comun' english girls. Think Vicky Pollard. Its often shortened to 'OMGDAAAAAAAAA!!!!' for use on the PC/text etc
"Ohmagodaaaaaaaaaaaaa! No way rich did you in an alley! That dude is bare buffting and was sooooooo gonna have ME at Rambos party!"
by Such power September 20, 2005