Allow me to clarifty.... the dogs knackers - ie. the.
Dog's bollocks
Meaning
Excellent - the absolute apex. In other contexts the word bollocks (meaning testicles) has a negative connotation. For example:
- 'that's bollocks' -> 'that's rubbish'
- 'give him a bollocking' -> 'chastise him'
- 'He dropped a bollock' -> 'he made a mistake'
The reasons why the 'dog's bollocks' are considered to be the top of the tree aren't clear. It may be linked to an associated phrase - 'stand out like a dog's balls', i.e. 'outstanding', although I can find no evidence to indicate that phrase as being earlier than the 'dog's bollocks'. Dogs do enjoy licking their genitals of course but again, there's no evidence that links the coining of this phrase to that. It is most likely that this is just a nonsense phrase, coined because it sounds good. In that, it would join a long list of earlier nonsense phrases, e.g. 'the cat's pyjamas', 'the bee's knees' etc.
Origin
The word bollocks, meaning testicles has been part of the language since the 18th century, but didn't become used to mean nonsense until the early 20th century. The 'dog's bollocks' seems to have originated in Britain in the first half of the 20th century. Eric Partridge recorded it in Edition 3 of A Dictionary of Slang and Unconventional English, 1949:
"Dog's ballocks, the typographical colon-dash (:-)."
That printer's term, although graphic, didn't have any associations with excellence and probably isn't the source of term as we use it today. It is more likely that the origin lies in a late 20th century reviving of the post WWI period outbreak of exuberant coinages.
Strangly I do also have an uncle called Bob.. and an Aunt Sarah. "Bobs your uncle" is indeed when things reach a satisfactory conclusion or as an alternative.... "Robert's your fathers brother"