bark at the moon

To make appeals in vain. Good luck talking to the principal, but I think you'll just be barking at the moon—I doubt you'll get a better grade.

Name	Pronounced	Usage
BÓThildr	-	Ancient Scandinavian
Gintaras	-	Lithuanian
FÚLvio	-	Portuguese (Brazilian)
Felizitas	fe-LEE-tsee-tahs	German
Emma	EM-ə (English), EM-mah (Finnish), E-mah (German)	English, French, Italian, Spanish, Swedish, Norwegian, Danish, Icelandic, Finnish, Dutch, German, An
Altair	-	Astronomy, Portuguese (Brazilian)