noun

• (uncountable) Dirt, filth or refuse.
  "Crud is caked in the crevices of her jewellery. All of it needs cleaning."
• (uncountable, figuratively, by extension) Something of poor quality.
• (countable) A contemptible person.
• (uncountable, skiing, snowboarding) A heavy wet snow on which it is difficult to travel.

verb

• (transitive) To clog with dirt or debris.
  "The covered cardboard boxes held and the packings in the crates suffered no further crudding."

intj

• (minced oath) Non-vulgar interjection expressing annoyance, anxiety, etc.; sugar, darn.
  "Oh, crud! I'm gonna be late for work!"

noun

• (databases, programming) Acronym of create, read, update, delete, the basic operations of a database management system.