the.com/flog
To beat a thing, or sell it, with equal disregard for its dignity.
means To whip someone or something hard, or in British slang, to sell or push goods aggressively.
from Surfaces in 1670s English slang, likely from Latin flagellare, to whip — schoolboys and sailors knew it intimately.
Dead horseYou flog the horse that cannot run faster.
British salesFlogging gear means selling it, no whip required.
Naval rootsFloggings round the fleet once enforced shipboard discipline.