Kira defines "dyke drama" as:

1) The phenomenon in a community which occurs when two lesbians break up. 2) Anything involving lesbians becoming unreasonably agitated due to stress. Usually associated with an overload of responsibilities. Has a tendancy to drive roommates insane.

I would add a third definition:

3) The cycle of lesbian relationships, i.e., meet, move in together, cheat on each other, break up but still live together, enter into relationship with the ex's ex, realize you're only together out of mutual spite for your share ex, break up, give up relationships, repeat the next week.