プログレッシブ和英中辞典(第4版)の解説
のさばる
❶〔好き勝手にする〕act as one pleases; have everything one's own way
町ではならず者たちがのさばっている
In the town the hoodlums have everything their own way.
❷〔横柄な態度をとる〕act important,《口》 act big;〔高飛車な態度をとる〕act high-handedly
そのころから軍部がのさばり始めた
About that time the military began to 「act high-handedly [《口》 throw their weight around].