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When you're mates go out on a sesh but don't invite you, commonly any organisation is done only when you are not around.
Person 1: Where is Ian tonight?
Person 2: Oh he's out on the sesh with a bunch of our mates.
Person 1: Wait there was a sesh tonight? No one told me?
Person 2: Oh.... secret sesh mate.
by shahed October 20, 2017
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