Hi Elvira, A "jock" is a person who plays and is very good at sports. They also spend a lot of time on sports. (There is a stereotype that jocks are often not very smart - but the word "jock" alone is just that they play sports) "Crack" is an illegal drug (It is a slang term for a version of cocaine). It is bad for you. Taking it can ruin your life. However, it is also highly addictive and people who take that drug seem to enjoy the feeling while they're using it and want to use it more and more and more (even though it is bad for them). People use the word "crack" as a slang term for something that they like a lot and keep using/eating/getting more of, often even when it's bad for them. So people will say that an activity they like is "crack" or a game that they play all the time is "like crack." I've heard (and used the term) "kiddie crack" for certain types of candy that children really like and will not stop eating. I've heard/seen/said "caramel covered crack" for a favorite food. In this case, calling this guy "crack" is saying that he's the type of guy her friend can't stop looking at, thinking about, and falling for. Also, that he's probably not a good choice. He's being compared to a drug. (She's calling him "jock crack" to denote that he's a certain type of guy (athletic) as opposed to the kind of guy her friend is into now. "Hipsters" do not play sports.)

Okay jock means rude and disrespectful. (With slang) https://www.google.com/amp/s/www.urbandictionary.com/define.php%3Fterm%3DJock%26amp%3Dtrue And in slang... Crack can mean, when referring to a person, someone who isn't serious. https://www.google.com/amp/www.urbandictionary.com/define.php%3Fterm%3Dcrack%26amp%3Dtrue I guess it's the equivalent of calling someone a stupid clown. (Crack also means cocaine or a crack in the wall.)

Hi Angela, it comes from Netflix series 13 Reasons Why. Two girls are chatting on skype. One of them moved thousands kilometres from her house and left her boyfriend (Justin) behind. The other girl fell in love with Justin. - So, anyway, I know you wanted me to hook up with Zach, but... - But... you're into Justin. - I'm evil. - No. Hardly. He's... jock crack. I get it. He's all yours. - No, I would never... - Seriously, I have moved on, times 2,000 miles, and I'm dating hipsters now. He's all yours.

Could you please add some context? (what movie? who says it and about whom? what was said both before and after this line?)

I have never heard this phrase in the states lol. Is it the Australian or British dialect? I'll look it up for you.