Meaning

• A more solid, dense or hard layer on a surface or boundary.

• The external, hardened layer of certain foodstuffs, including most types of bread, fried meat, etc.

• An outer layer composed of pastry

• The bread-like base of a pizza.

• The outermost layer of the lithosphere of the Earth.

• The shell of crabs, lobsters, etc.

• Nerve, gall.

  "You've got a lot of crust standing there saying that."

• A living.

  "to earn one's crust"

Meaning

• To cover with a crust.

• To form a crust.

Meaning

• A subgenre of punk rock, derived from hardcore punk with extreme metal elements, often with pessimistic lyrics about political and social ills.