Leave it alone : nm (word coming as song refrain, onomatopoeia).
The word "tralala" has several meanings:
1. Familiar: Luxury research et seeing (flashed).
receive at dinner en large hooray.
And all the stuff: and all that ensues.
2. Pageantry, ceremonial (chichi).
Quotation from the French writer Jean Giono (1895-1970): “I like the tralalas and the manners”.