So, I couldn't find a thread on Oi! I'm by no means an expert on it, but it's my favorite genre of punk, and considering there's nothing on it so far, here's my best shot.
What is it?
Well, here's the wikipedia article (LINK). Like all things wikipedia, this is the aggregate opinion of the masses, so it's both worthless and informative. If I had to describe Oi! in a terse manner; Oi! is the opposite of prog-rock.
Here are some of my personal favorites;
Combat 84, Combat 84:
Angelic Upstarts, I Stand Accused:
The 4-Skins, Clockwork Skinhead:
Cockney Rejects, Oi! Oi! Oi!:
Skinflicks, Skinhead:
The Business, Streets Where You Live:
No Sham 69? No Sham 69. Never really found them too entertaining. Go figure.