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1.
When a person dresses in a business suit and changes their personality i.e. gives attitude, is boring and unfriendly and just generally turns into a wanker.
"You were so caring and lovely to me last night when you were wearing your cowboy pyjamas, but ever since you got ready to go to the office, you're giving me suittitude"
by joeyshabadoo March 02, 2010