It simply means that a person is speaking their thoughts and ideas out loud in an attempt to make themselves look impressive usually a show off or know it all type person
It is more often seen as blow your own horn, and is used to mean someone that is bragging.
It means that you are praising yourself or bragging about yourself.
You could say they were blowing (or tooting) their own horn.
The abstract noun of the idiom "blowing one's own trumpet" is "self-promotion" or "self-aggrandizement." This refers to the act of boasting or bragging about one's achievements or abilities, often to gain recognition or praise. Such behavior emphasizes an individual's desire for validation or acknowledgment from others.
Abstract nouns that may represent the term 'blowing one's own horn' are promoting, boasting, or bragging. These are words for a concept.
It means to act is a boastful manner, to tell everyone loudly about your own achievments
You would say they were "full of themselves" or "blowing their own horn."
It's BLOW YOUR OWN HORN. It means to brag about yourself.
When someone's goose is cooked, it means that the person is doomed. If I have cooked my own goose, it means my failure or downfall is my own fault.
It means to be more concerned about what you are doing than checking on what others are doing.
If you dance to a different tune, you are behaving differently from the others, going your own way, doing your own thing.
Nobody really knows who first said this idiom.
It is not an idiom, it is fact. A hose can be used for a water level with hundreds of feet between the two points. As long as two bodies of water are connected somehow, they will be at the same level. As an idiom, it would mean a person tends to seek out people they feel are equal or have the same point of view.
Trumpeter. =)