Webster's Revised Unabridged Dictionary · 1913

Quid

Quid , noun

[See Cud.]

A portion suitable to be chewed; a cud; as, a quid of tobacco.

Quid (kwid) , noun

[Etym. uncertain.]

An English coin, a sovereign. [Slang, English]
They invited him to come to-morrow,... and bring half a quid with him. — Charles Reade

Quid , transitive verb

(Man.) To drop from the mouth, as food when partially chewed; -- said of horses. — Youatt