One I heard a very long time ago, which may be a fake. Victorian era actress saying to her dastardly co-star 'You put one finger in me and I'll cream!'
I used to share a house with a modern Mrs Malaprop and my favourite was (after she had set a chip pan on fire) "We really could do with a Fire Distinguisher". I had visions of a piece of equipment that we could send in to the kitchen and it would come back out and say "Yep, that's definitely a fire you've got there".
"Half a pound of tupenny rice, half a pound of treaclefight. Pop goes the Queen." "Pacific & Specific." Maybe the world is your lobster, but not a malapropism, just a variation of a popular phrase.
My daughter in Law, who always genuinely got words wrong, said of her son who had two malformed baby eye teeth "Look at him he's stood there like a little Jackular"
A former workmate of mine was walking with his mother when she spotted a clematis plant. She had him (and everybody else nearby) in fits of laughter when she loudly exclaimed, "Look at that beautiful cl*toris on that wall!!!"
Boil my icicle instead of oil my bicycle. I'm not sure if this one counts but my wife was talking to young people the other day about the rap/hip hop artist 'Half a dollar' - referring to 50 Cent.