Definition of "rugger"
rugger
noun
countable and uncountable, plural ruggers
(uncountable) rugby
Quotations
To complete the picture of the main line passenger workings, mention must be made of the excursions for International rugger and soccer matches. [...] For the rugger matches especially, a dozen or so packed trains from West Wales are put on [...]
1959 April, William Jones, John Hodge, “Resorts for Railfans - 28 Cardiff”, in Trains Illustrated, page 210
Quotations
To this day ruggers belittle soccer, and they will tell anyone who expresses the slightest interest in their game that rugby is "a ruffian's game played by gentlemen," while soccer is "a gentleman's game played by ruffians."
1974 August, Paul Burka, “The Sport of Rough Gentlemen”, in Texas Monthly, volume 2, number 8, page 42
Some of the world's most talented ruggers had come to New York for the weekend to play for fun. "What's football — just an Americanization of rugby," exclaimed one fan at the 38th Annual New York Sevens Tournament. … Brian Corcoran, who in 1990 played for Team USA for free, distinguished ruggers from "the spoiled, arrogant professionals you're dealing with in other sports."
1996 December 16, Shannon Black, “Rugby: Aliens 3, Locals 0”, in New York Magazine, volume 29, number 49, page 22
After the game, the teams adjourned to the Dolphins’ usual after-match location, O’Brien’s Irish Pub on Main Street, where they enjoyed a spirited social together: songs were sung, speeches and presentations were made, and mutual admiration was expressed, particularly toward the soldier-ruggers of the 7th for their sacrifice and dedication.
2011 June 8, “Club sports: Touring British Army ruggers welcomed”, in Santa Monica Daily Press