Newcastle and Everton are on general sale. Cardiff is on sale to all season ticket holders at the moment and I'm sure will go on general sale. I don't think Man City or Liverpool sold out. I doubt any away game until Bournemouth will sell out.
Gets sung fairly often at away games.
Full chant is:
We’re 1-0 down
Who gives a ****
We’re Brighton and Hove Albion
And we’re staying up
It first got sung during the occasional defeat during our promotion season (but going up instead of staying up).