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Used to sarcastically act like you aren't trying to brag about something that isn't worth bragging about. Should make it seem like you are bragging about it. Usually said in a sarcastic tone. Not to be used when something actually is a big deal.
Starbucks lady: "Total is $4.23"
Me as I hand her $4.23: "Exact change, no big deal"

or

Girlfriend walks in, me on the computer
Me: "Just checking the spiderman forums, no big deal."
by ProbablyBetterThanYou June 22, 2009
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4
something said after something amazing has been accomplished, usual said in a sarcastic to make ones self seem modest when in reality one is bragging. usually followed by "'cept it is"
i just got a 100 on my test! no big deal, 'cept it is
by cmacdaddy September 16, 2009
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