Full of vervevɜːv] and vitality; more recently - with many features [ˈfiːtʃə] or attributes.əˈtrɪbjuːt]
Origin
From the advertising 【ˈædvəˌtaɪzɪŋ] posters used to promote the 1929 film Broadway ˈbrɔːdˌweɪ] Melody(ml-d) - the first musical film - which proclaimedprəˈkleɪm] it to be 'All talking All singing All dancing'.
That was a literal description of the film, but was also intended to suggest a sense of vitality and excitement that the phrase is now used to convey.kənˈveɪ]
In more recent years the term has been applied to high-tech equipment, computers, cars etc. in order to draw attention to their abundant [əˈbʌndənt] features; for example, this from The Daily Telegraph, November 1995:
"Satellites as small as a box of cornflakes can be launched at little cost by riding piggyback with larger satellites. A handful of these 'microsatellites' would be used instead of a single all-singing all-dancing 'platform' [ˈplætfɔːm]bristling(brsl). with instruments."