φρενοκλόπος
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)
ον,
A stealing the understanding, deceiving, Ἔρως APl.4.198 (Maec.).
German (Pape)
[Seite 1304] den Verstand raubend, dah. betrügend, täuschend, Qu. Maec. 9 (Plan. 198).