To say that one could fry an egg on the sidewalk means it's very hotoutside. It is actually possible to fry an egg on the sidewalk with the help of mirrors or a solar concentrator. This is often done in developing countries.
It's so hotoutside that you could fry an egg on the sidewalk.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi