As far as I know it should mean slow. But I haven't found this word on any online or offline dictionary.
So the word is used in the song Solanin by Asian Kung-Fu Generation. The first time I heard this word was in the 1st episode of the anime "The Daily Life of High-school Boys". It was subtitled as slow. However, since then I haven't found it on any dictionary; I looked up online but still in vain. Does this word really exist and if it does, what does it really mean?