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
Nessa (1)	NES-ə	English
Vipin	-	Indian, Hindi, Marathi, Malayalam
Lindiwe	-	Southern African, Zulu
Erlingur	-	Icelandic
Luben	-	Bulgarian
Sonia	SON-yə (English), SAWN-yə (English), SO-nyah (Italian)	English, Italian, Spanish, Portuguese, Romanian