ἱππούραιον
From LSJ
ᾗ μήτε χλαῖνα μήτε σισύρα συμφέρει → content neither with cloak nor rug, be never satisfied, can't get no satisfaction, be hard to please
English (LSJ)
τό,= ἵππουρος,
A horse-tail, Arat.438.
German (Pape)
[Seite 1261] τό, = ἵππουρις, bei Arat. 438 der Pferdeschweif.