くさぼうぼう
covered with weeds
Also written 草茫茫、草茫々
No-adjective
せっかくの広ひろい庭にわなのに、草くさぼうぼうじゃ台無だいなしだな。
Even tough it's such a big garden, it would be wasted if we let it get overrun with weeds.