Post your favorite chord progression.
I like F-F7-Bb-Bbm6
The I - vi - III6/4 Progression:
or rising semitones in the bass:
Kind of cliched, but still good
I've never studied music theory but I always loved weird chord shit that challenges me to improve my listening. Ever since I heard Hindemith's stuff.
Come on, we can at least be a little helpful. I understand it's a simple question but there's something to be said for not being so dismissive.
bIII means a major chord built on the flattened third scale degree. For example, in C major, bIII would be Eb major. This idea extends to other scale degrees, so bVI would be Ab major. These are often analyzed as chords "borrowed" from related keys or modes. Both bIII and bVI appear in the parallel minor. If you want some more examples/related reading look up borrowed chords or alt