Oops! = after making a minor error
Whoops! = after dropping something unimportant
Yikes! = semi-humorous expression of mild alarm
Mmm = (level intonation) I'm sceptical about what you have just said
Mmm? = (rising intonation) What was that? Pardon?
Mmm-mmm = That's delicious!
Ups-a-daisy! = Said to a child when it has fallen, to try and get it back up on its feet and moving before it starts screaming.
p.s. LOL at Mr P's handy guide to correct Oo-er etiquette... and a nostalgic hooray! for the Carry On films. It's been so long, I'd almost forgotten (oo-er)!