"Anal" on it's own isn't that bad, although you will be excluding everyone who doesn't know the Freudian term. Juxtaposing it with "sloppy" is going too far. Even if you're not offended by it, being slapped in the brain with that much graphic imagery when you're not expecting it stops you from engaging with the website.

Maybe "nonchalant" would be a fun replacement?

Maybe rename it Knopfler

Or maybe Strict,Right On, Meh/Close Enough?

I like it!

Mark Knopfler --- Slash --- Neil Young

No worries, I'm unfamiliar with the terms, with being a work and all; curiosity could kill this cat.