It's hilariously funny, and you will have upped your swearing game by 1,000,000% with all the very best of British profanity๐๐ป.
Discussion
I have 2 copies, it's constantly being updated๐๐. I think i might treat myself to the latest edition, it's been a while...
From a Reddit thread asking for fave entries i found:

Mumblers - the right yoga pants some women wear, because you can see the lips moving but can't work out what they're saying ๐๐