off one's rocker

Also, off one's nut or trolley . See off one's head.

Name	Pronounced	Usage
Lycurgus	-	Greek Mythology (Latinized), Ancient Greek (Latinized)
Odelia	-	English
Concetto	kon-CHET-to	Italian
Fraser	FRAY-zər, FRAY-zhər	Scottish, English (Rare)
DÖRthe	DUUR-tə	Low German
Bee	[bi:]