E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Very like a whale. Very much like a cock-and-bull story; a fudge. Hamlet chaffs Polonius by comparing a cloud to a camel, and then to a weasel, and when the courtier assents Hamlet adds, Or like a whale; to which Polonius answers, Very like a whale. (Act iii. 2.)