Be a bed of nails British phrase UK informal
To be painful, difficult, or unpleasant.
Living with strangers in a shared apartment is a bed of nails.
Eating out with Leo is a bed of nails. He is so talkative that I can't get a word in edgeways.
Her brother's care has been a bed of nails for her all these years.
It is difficult for someone (not) to do something.
To be put in a bad mood
Used to refer to an unpleasant, repellent place, thing or person
The verb "be" should be conjugated according to its tense.
To punish someone or something harshly
He's a really strict teacher, so he'll definitely lower the boom on you if you don't do your homework.