развесистая клюква

Etymology
lit. 'highbush cranberry'. Supposedly in reference to a French writer's description of Russian cranberry plants (which in the wild grow only a few centimeters tall) as tall shrubs or trees. Attested early 20th century.

Nabokov pointed out that the expression literally translates to “highbush cranberry” in English, but in Russian (unlike English) it appears absurd because Russian uses entirely different terms for tall shrubs in the genus   and dwarf plants in the subgenus.

Noun

 * 1)  ignorant stereotypes and tall tales, especially in Western depictions of Russia