A Kern Burn is the burning sensation, generally followed by a longstanding rash and obvious infection, caused by a build up of akerna. As there is no currently recognized treatment for akerna build-up, it is often associated with negative connotations as with herpes for being an STI that won't go away and being associated with it will ruin anyone's life.
I got involved with the wrong STS company and now I have kern burn all over my junk. There's no way I'm ever going to get this akerna removed in time for my date with your mom.