Meaning of JR in English
JR /ˌdʒeɪ ˈɑːʳ/ BrE
J. R. Ewing, a character in the US television programme ↑ Dallas , which was popular in the 1970s and 1980s. JR was in charge of the family's oil business. He was a successful but dishonest businessman who seemed to be interested only in money and power.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012