Nothing rude here - it's the name of a beer (honest)!
Butt refers to the large barrels used in brewing - yeah of course it does!
From the Milk Street Brewery - A beer called The Usual - we can't wait to get to the bar to ask for a pint of The Usual (Ha!)
Old Engine Oil - Not really selling it with the name here are they... but apparently it's a "remarkably smooth, creamy brew with a beautiful velvety mouthfeel".
Yeah...loving the beer based pun - makes us feel very hoppy indeed - get it?! Hoppy - ok..
And last, but not least Profanity Stout - made us swear anyway - Bloody Great !!