be (as) thin as a rail

To be extremely skinny or slender. Primarily heard in US. Have you seen Claire lately? I'm really worried about her, she's as thin as a rail! I've always been thin as a rail, even when I tried to gain weight.

Common Names:

Name	Pronounced	Usage
Lilith	LIL-ith (English)	Near Eastern Mythology, Judeo-Christian Legend
Jeroboam	-	Biblical
Miela	mee-E-lah	Esperanto
Fiona	fee-O-nə	Scottish, English
Feray	-	Turkish
LechosŁAw	le-KHAW-swahf	Polish