Yellow-bellies
.“When the Queen’s Prize was won at Wimbledon, July 21st, 1885, by Sergeant Bulmer, 2nd Lincoln, his victory was hailed with ‘Well done, yellow-belly!ʹ in allusion to his being a Lincolnshire man.”—Notes and Queries, August 22nd, 1885, p. 146.
“Ah, then, agin, it kin scarce be Mexikins neyther. It ur too fur noʹth for any oʹ them yellow-bellies.”—Coptain Mayne Reid: The War Trail, chap. lxxi.