► 副詞うんと  [(1)うんと]  [coll]  [peer]    
meaning:  a lot  rank: 2☆ 
今日はお
祝いだからうんと
奮発しよう ⇨ Today is a celebration so I am willing to spend a lot  
(☛ Usually positive)More examples:- 彼に問いただしてもうんともすんとも言わない ⇨ I grilled him but he kept completely mum, said absolutely nothing