What part of speech is jerk?

"Jerk" can be a few different parts of speech, depending on how it's used:

* Noun: A rude or unpleasant person (e.g., "That jerk cut me off in traffic.")

* Verb: To move with a sudden, sharp motion (e.g., "The car jerked to a stop.")

* Interjection: Expressing annoyance or surprise (e.g., "Jerk! You spilled coffee all over my keyboard!")

The context of the sentence will tell you which part of speech is intended.