No picnic
Not pleasant, difficult.It was no picnic trying to drive to the lake during the storm.
No matter what happens
In any event, without regard to what happens.No matter what happens I plan to go swimming on Saturday.
No matter
Regardless.No matter how hard that I try, my piano teacher is never satisfied.
No love lost between (two people/groups)
Bad feelings or ill will between two people or groups.There is no love lost between my father and our neighbor.
No laughing matter
A serious matter.The incident was no laughing matter and was taken very seriously by the police.
No kidding
Honestly, really."No kidding, are you really going to buy a house."
No joke
A serious matter.The mistake with the meeting time was no joke. It caused many serious problems.
No ifs, ands, or buts about it
Absolutely no discussion or doubts about something."You are going to bed now no ifs, ands, or buts about it," said the mother to her child.
No holds barred
With no restraints.There were no holds barred during the debate between the two politicians.
No hard feelings
No anger or resentment.There were no hard feelings between the two women after their fight at work.