Those tall ornamental grasses that people have for landscaping decorations. I have one in my front yard that is massive. It's just a pain in the ass to cut down every spring or fall. The cutting down isn't so bad, but dealing with the grass is the annoying part. Sometimes I burn it. Sometimes I cut it up and bag it and it t it out with the trash. Sometimes I put it in the back of a family member's truck and haul it to my grandmother's and toss it down over her bank into the woods. The last one is the easiest.