Bay at the moon phrase
The verbs "bark" and "howl" can substitute for the verb "bay".
If someone "bays at the moon", he/she misuses his/her time and energy to do something that seems to be impossible or futile.
She wants to find a high-paid job without any experiences. I think she just bays at the moon.
Telling him that he was cheated is just baying at the moon.
She does exercise to lose weight, but she keeps eating like a horse. I bet that she's just baying at the moon.
The verb "bay" should be conjugated according to its tense.
The barking of dogs at a full moon has been a metaphor for futile activity since the mid 17th century.
A remark you make when you are leaving on the purpose of creating a stronger impact
The letter he left before leaving was his parting shot.