The situation and condition in which where, when learning a foriegn language, you start to slowly get worse at your first language.
"so i has been learning german recently..."
"Uh, dude, don't you mean 'I *have* been?"
"Oh, oops, you're right. Sorry, I've been suffering from Kaia Syndrome"
Based on the word bonerjams, this describes a song very popular with old people.
"Hey, have you ever heard Thunderstruck by ACDC?"
"Yeah Bro, my Dad plays it all the time. It's a total boomerjam."