clot

noun

• 1a thick mass of coagulated liquid, especially blood, or of material stuck together:a blood clot a clot of dead leaves

• 2British informal a foolish or clumsy person:Watch where you’re going, you clot!

verb (clots, clotting, clotted)

• form or cause to form clots: [no object]:drugs that help blood to clot [with object]:a blood protein known as factor VIII clots blood
• [with object] cover (something) with sticky matter:its nostrils were clotted with blood