In this case, Jon is trying to fish something " out of the trash" (trash).

在这种情况下，乔恩正试图从“垃圾桶”（trash）中捞出一些东西。

" To fish" (fish) something out of something else means to take something out of a container where it is surrounded by other things.

“To fish” （捞出）something out of something 的意思是从一个被其他东西包围的容器中取出某物。