Contraction of "Rugby bummer" - used to describe a less evolved sub-sect of the Homo Sapiens species. Behavioural patterns are typified by highly homoerotic tendencies acted out within an organised sporting environment (most commonly Rugby in the UK). Paradoxically, this type of individual tends to attract affluent and intelligent females - possibly owing to their grotesque steroid-fuelled physique.
"I tried to chat up that chick, but her rugbum boyfriend intercepted me."
by gentaXY February 10, 2009