I went digging around my hard drive for series I hadn't watched yet and found Gin no Saji so I'm watching that now. I don't know what it is about agricultural-themed series but I really find them fun. >>487
This is the first I've heard of anyone using it like that. But a lot of terms, waifu probably being the most common, have been misused for a while now. Hell, I saw some 'notice me senpai' meme come up on my mom's FB feed recently. The image wasn't even 2D so I imagine it's spread pretty far into mainstream sites.