In The Sweeney.....!

[amac]

Actually last 3 episodes have had little slang or was 'easy';
"He's a bit mutton" - mutt n jeff -= deaf (cartoon characters)
"He couldn't keep his thieving Germans off them" German Bands = hands
and
" someones done the bubble on you and...." bubble and squeak = speak , in this context bubble = to inform

still got a few more to watch
ta ta

Why do we say "ta ta" for goodbye? (Often used by Terry in Minder)?

[heathfield]

All the dictionaries agree that ''Ta ta'' began to be used in the early 1800s, but its origin is ''unknown''.

[alfiesgirl]

Ok..being a Londoner i have different answers than you already have which are:
German=Shmitz=Mitts=Hands
Bubble and squeak=Bubble(cries) and squeak=squeal(informs)
Ta Ta=Thanks and goodbye
Mutton n jeff-Deaf (cockney slang)

have you got any more lol

[EdScratcher]

"ta ta" = maybe short for 2tatty bye"