Webster's Revised Unabridged Dictionary · 1913

Cherup

Cherup , intransitive verb

[Probably from chirp.]

To make a short, shrill, cheerful sound; to chirp. See Chirrup.
Cheruping birds. — Drayton

Cherup , transitive verb

To excite or urge on by making a short, shrill, cheerful sound; to cherup to. See Chirrup.
He cherups brisk ear-erecting steed. — Cowper

Cherup , noun

A short, sharp, cheerful noise; a chirp; a chirrup; as, the cherup of a cricket.