Terms like locking in, ghosting, monk mode, winter arc, are common in the self-improvement scene on YouTube. A period of extreme focus and isolation to go deep into something.

Another spin (02:00) is that of an almost monk like quality. That of self discovery and inner transformation. So these terms have both a productive and (spiritual) transformational spin to them. I remember Tarik (friend) saying to me that you should become unrecognisable in these three months. Literally becoming something else (ie transformation).