noun - low-quality behaviour that is dishonest, immoral, or cheap, especially in politics, business, or sexual matters
verb - to improve a skill, technique, or ability by practicing it regularly
verb - to sharpen something, especially a blade, by rubbing it on a stone or similar surface
noun - the last name of the inventor of the glue stick
adjective, American English, informal - having too much air in the stomach
adjective, British English, informal - (of fizzy drinks) containing too much air, containing too many bubbles