Be no picnic informal
If something "is no picnic", that means it is difficult or challenging.
Getting up at 4 a.m on Sundays is no picnic for me.
Bringing up a child is no picnic, especially when you are a single parent.
Living without electricity was no picnic.
Used to describe something very hard
Refers to two subjects that do not share any common characteristics
Used to describe the action of treating someone very strictly.
Something that is impossible to happen, to achieve, or to be done.
1. To be aroused in terms of sex
2. To indicate something hard or firm
The verb "be" should be conjugated according to its tense.