John Bull n.1
1. [early 18C+] an Englishman, the British, Great Britain; an English ship; thus John Bull-land, England/Britain; see also (1846) Lady Bull, an Englishwoman; also attrib.
2. [mid-19C-1900s] an English woman.
3. [1910s] (US short-order) a beefsteak.
[19C] self-conscious promotion of the stereotyped characteristics of a ‘true’ Englishman.
[1910s] agressively patriotic.
[mid-19C] an Englishman.
[1940s–50s] (Irish) an Englishman.