A bliss ninny noun phrase
Used to describe someone who is extremely happy
She was a bliss ninny when hearing that she passed the exam.
To make someone feel more confident or happy, especially when they thought that they can't achieve what they want
Happy or cheerful; in a good mood
To smile broadly
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.