Kudt refers to a Dutch word which means
f***ed up life. It is said as a joke if you don't like something, such as FTS. For example, Heb ik alwéér een 3! Kudt!
Online jargon, also known as text message shorthand, used in texting, online chat, instant messaging, email, blogs, and newsgroup postings, these types of abbreviations are also referred to as chat acronyms.