expression, i-adjective
incredible; amazing; extreme; unbelievable
Colloquial expression meaning something is extraordinary in degree, either positively or negatively. Derived from 中途半端ではない (not half-hearted). Used for emphasis, similar to 'insane' or 'crazy' in English.
See also: 中途半端
That athlete's stamina is incredible.
今日の暑さはハンパないね。
The heat today is insane, isn't it?
彼の努力ははんぱないと思う。
I think his effort is extraordinary.