You said you weren't too fussed about genre,
so I'm going to say The Pogues.

(You may not wish to take the advice of someone who doesn't recognise the sounds of today's popular youth bands though.)

Edit:
also - Afghan Whigs in their rock-y stage; The Wildhearts "Earth vs. The Wildhearts"; Stiff Little Fingers.
( crackhouseceilidhband Fuck off back to Mumsnet, Mon 15 Jun 2009, 12:14, 2 replies, latest was 16 years ago)

Whilst I need more Irish rock on my music collection
This is not nearly fast enough :(
( Captain V, Mon 15 Jun 2009, 12:19, Reply)

Stiff Little Fingers
defo, in that case.
( crackhouseceilidhband Fuck off back to Mumsnet, Mon 15 Jun 2009, 12:21, Reply)

How about Flogging Molly?

(wellgroomedwookiee is a filthy-minded hobgoblin, Mon 15 Jun 2009, 12:22, Reply)

Faster, faster
*sniggers*
( Captain V, Mon 15 Jun 2009, 12:24, Reply)

*smirks*

( crackhouseceilidhband Fuck off back to Mumsnet, Mon 15 Jun 2009, 14:27, Reply)

Fast Irish rock?
Therapy? should fit the bill nicely.
( Cawl, Mon 15 Jun 2009, 12:22, Reply)

FUCK, YEAH!
But only Nurse and Troublegum.
( crackhouseceilidhband Fuck off back to Mumsnet, Mon 15 Jun 2009, 12:23, Reply)

I saw 'em yesterday!
Going Nowhere was fucking amazing live!
( Cawl, Mon 15 Jun 2009, 12:32, Reply)

Have they still got it?
I saw them about 6 times in the early days, from tiny wee venues to the Ulster Hall and some festival that I can't remember. Then they released Infernal Love and it all went to shit.
( crackhouseceilidhband Fuck off back to Mumsnet, Mon 15 Jun 2009, 14:29, Reply)

Listening to the dropkick murphys now
Will have some therapy later.
( Captain V, Mon 15 Jun 2009, 12:25, Reply)

+1 for The Wildhearts!
Awesome band.
( Labia Majora You keep on talking but it makes no sense at all, Mon 15 Jun 2009, 12:29, Reply)

I was at one of their gigs when they released that
and the bassist was sick on me.
( crackhouseceilidhband Fuck off back to Mumsnet, Mon 15 Jun 2009, 12:32, Reply)

Not surprised, he was always sick on stage
Bad knee / massive heroin addiction FTW!

I didn't see them on that tour, first saw them on the PHUQ tour. Got me into rock, they did!
( Labia Majora You keep on talking but it makes no sense at all, Mon 15 Jun 2009, 12:34, Reply)

Happy b3taday, gorgeous.

( thealternativefact, Mon 15 Jun 2009, 12:37, Reply)

Thank you lovely! :D
Ahh, i love b3tadays!
( Labia Majora You keep on talking but it makes no sense at all, Mon 15 Jun 2009, 12:51, Reply)

And WOO!
I claimed the fourth space in the car, so I'm coming on holiday with you. YAY!
( thealternativefact, Mon 15 Jun 2009, 12:56, Reply)

Now THAT is a claim to fame !

( G/PP 💩💩💩💩💩&#128, Mon 15 Jun 2009, 12:36, Reply)