Subtok is the meaningless word, however as it is meaningless often its meaning becomes fluid and can change depending on context.
Its worth noting subtok, can not be split into two seperate words sub and tok. It is a single word.
Subtok can be used as an insult e.g. 'what you are saying is so subtok' (what you are saying is meaningless) or 'you life is subtok' (you live without meaning)
However has also been used as a compliment, however tone of voice is important in the associated meaning of the meaning-less word.