Clot is a noun that refers to a thick, almost solid mass formed when blood or another liquid coagulates.
In medical terms, a blood clot can be life-saving when it stops bleeding, but dangerous when it forms inside blood vessels.
The term "clot" also has these meanings:
1. A stupid or foolish person (British slang)
2. To form into clots (verb)
3. In cooking, when liquids like milk or cream form lumps