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."
The opposite of a big deal. The go-to catch phrase whenever you are presenting something in a humble light. This phrase is not sarcastic in any light and should never be confused to mean a big deal. It is by no means a big deal whatsoever, no big deal. Also not to be confused with yes big accord.
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