ACQUAINTANCE, n. A person whom we know well enough to borrow from, but not well enough to lend to. A degree of friendship called slight when its object is poor or obscure, and “intimate” when he is rich or famous.

Ambrose Bierce (1842-1914?) American writer and journalist

“Acquaintance,” The Cynic’s Word Book (1906)
    (Source)

Included in The Devil's Dictionary (1911).