楚霸王困垓下 chǔbàwángkùngāixià to be cornered from all sides
(xiehouyu) trapped like the Hegemon King of Chu at Gaixia; describes a situation where one is isolated and under attack from all directions; the first half of a two-part allegory whose second half is [[四面楚歌|四面楚歌|si4 mian4 chu3 ge1]]