SUX definitions from urbandictionary.com,
i think he/she are unique, named himself/herself as a sucks person. My investigation on youtube.com found "9W2SUX" keyword on mypapit's channel. From his website, http://please.name.my i can say that mypapit also a Malaysian amateur radio class B operator, 9W2WTF.
on one of his video, he mentioned my previous class B callsign and 9W2SUX. He identified 9W2SUX as matjan. im not sure who is matjan and who is 9W2SUX apparatus assignment holder now, better ask mypapit a.k.a 9W2WTF for more info.