There are some (emphasis on 'some') good moments in Grimsby. I sniggered twice (and would have a third time if that moment hadn't already been in the trailer) and there are a couple of surprisingly solid action sequences, primarily the ones with Mark Strong helming them.
That said, I still didn't like the movie. It's oft lazy and the quote unquote "humour" is almost entirely of the gross-out variety. It's like "HEY LOOK A DICK! HEY LOOK SOME POOP! FUCK YOU GIVE US YOUR MONEY!".
Must admit, I've never seen a "football hooligan/espionage/action-thriller/adult-comedy/family drama" before though.
Final rating:★★ - Had some things that appeal to me, but a poor finished product.