hide or hair

[hide or hair] or [hide nor hair] {n. phr.}, {informal} A sign ortrace of someone that is gone or lost; any sign at all of somethingmissing. Usually used in negative or interrogative sentence.

Tommyleft the house this morning and I haven't seen hide or hair of himsince.

A button fell off my coat and I could find neither hide norhair of it.