Kitchen Gadgetry

While we’re talking about knife sharpening over in that other thread, I thought I’d ask about cutting grass. It’s not quite kitchen but I couldn’t find the garage gadgetry thread.

I have a weird yard with awkward terrain. Parts of it sprout grass, especially on a hill adjacent to my neighbor’s wood fence and down in a little triangle of dirt where my kid’s dead pets are buried. I could do nothing, but it turns into “evil plant” a.k.a. foxtail if I leave it alone (also it’s a fire hazard). There’s not a lot to cut and since the terrain is so weird I can’t use a lawn mower. What device should I get to cut this grass myself?