crack fever

When you used to be sociable and then you started using crack (meth) and became anti social due to your drug use. You got the crack fever.
Also if you're a crack user and you make plans to go and do something social (meaning outside of your room or home) and then you flake out, you got the crack fever.

John: hey bro what's doin? Keen to go to the pub for a couple beers?

Larry: yeah bro when do you want to go?

John: I'll be at yours in an hour.

John arrives at Larry's

John: oi bro stop smashing the pipe, let's go down the pub

Larry: nah bro nah, I'm just gonna chill here ay.

John: fuck bro you got the crack fever