The term used to describe whilst one is in public, usually at night time under the influence of alcohol, in desperate need of relieving ones self.
90 referring to the standard fine someone is given if they are caught by police, spot being the corner or designated area, suitable to nip down and wet your proverbial whistle.
'Hold my bag a minute and wait there while I go find me a good 90 spot'

'okay but hurry up I really need to go myself'
by Lemongitis February 9, 2009
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