A sub-genre of punk. Typically more appealing to the main-stream audiences than the grittier street sound, but by no means bubble gum rock. Applied usually to the original flagships of the punk movement (the clash, sex pistols, buzzcocks, and the various other like bands), it can also be applied to any of the more dissonant sounding bands of the time--that is 1977, considered by many to be a pinnacle in punk's history.
I prefer Oi! to street, but 77 would probably be my favorite.