Kiwi asks…
What is "jerk" and "jerky"?
Answer from a Native speaker

Rebecca
"Jerk" is a slang expression for someone who is obnoxious, rude, or an asshole (usually referring to a man). In addition to using the word "jerk," the speaker in this video has also added "-y" to the end of "jerk" to make it an adjective. Technically, this is incorrect but this show is known for making up words, like "jerky" here. Ex: My older brother is a jerk. Ex: Don't be a jerk to others. Karma will get you.
Listening Quiz
1/2 STEP LEARN