noun which may take the genitive case particle 'no'
overgrown with weeds; weed-choked
Describes a place, such as a garden or vacant lot, that is thickly covered with weeds and looks neglected.
空き地が草ぼうぼうになっている。
The vacant lot is overgrown with weeds.
庭は草ぼうぼうで、手入れが必要だ。
The garden is weed-choked and needs tending.
Compound of 草 (kusa, 'grass, weed') and the mimetic adverb ぼうぼう (bōbō), which depicts something growing thickly or wildly. The exact origin of ぼうぼう is uncertain, but it is a sound-symbolic word suggesting abundant, uncontrolled growth.