Question

to be no picnic - It's no picnic looking after three small children all day long.  - We had to spend three days in the hut without electricity or running water. It was no picnic, I can tell you!  - Writing it was no picnic. I’d never done anything like this before.  - You realize this is not going to be a picnic and that you're not going to have the time of your life.

Accepted Answer

to be difficult or unpleasant

Idiom	to be no picnic
Definition	to be difficult or unpleasant
Examples	- It's no picnic looking after three small children all day long. - We had to spend three days in the hut without electricity or running water. It was no picnic, I can tell you! - Writing it was no picnic. I’d never done anything like this before. - You realize this is not going to be a picnic and that you're not going to have the time of your life.

Picnic Difficult Unpleasant Small Children Day Long Spend