The deepest level of frienzone, the catzone. You are thought of as a cat by the person who put you in the zone.
It is when you have to unbutton your shirt passed the publicly acceptable point.
It's so hot , I'm going full jf
It is when you are in a climate where the weather is so hot and humid you have to unbutton your shirt passed the publicly acceptable point.
Look at the guy sporting a full JF