A small amount of knowledge can cause people to think they are more expert than they really are.eg. he said he'd done a course on home electrics, but when he tried to mend my table lamp, he fused all the lights! I think a little learning is a dangerous thing
Something or someone that can be compared to something or someone else, but is not as good is a poor man's version; a writer who uses lots of puns but isn't very funny would be a poor man's Oscar Wilde.
People who are loud and talk a lot usually have nothing of substance to say. This contrasts with "Still waters run deep." Other versions are "Shallow brooks babble loudest" and "Shallow brooks are noisy."
Used colloquially to describe having sexual intercourse with someone who is not a virgin, especially when they are in a relationship. The analogy refers to a loaf of bread; it is not readily apparent, once the end has been removed, exactly how many slices have been taken.('You never miss a slice from a cut
loaf' is also used.)