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The state of drunkenness from encountering another's posterior region, aka, buttdrunk. Mostly a guy thing but females are not excluded.
Allison's running around the house in nothing but a tshirt and panties, now Justin's suffering from a severe case of rumbum.

Rumbus grumbus 

Rumbus grumbus is used in the show 'generation loss' on twitch and youtube .It is a word charlie slimecicle used to describe his hunger.
Charlie:what's your name?
Ranboo: ranboo
Charlie:rumbus? Rumbus grumbus? My tummy's a little rumbus.grumbus
Rumbus grumbus by Googoobie June 17, 2023

Rumbunctious 

The act of being rambunctious, wild, or unruly under the influence of rum or other related alcoholic beverages.
Dude! You should have seen yourself at the party last night. You were pretty rumbunctious!
Rumbunctious by Jargonovski1 December 26, 2010

rumrumtiger 

rumrumtiger:
a word that origanted because of ace's shitty spelling while he was talking about my tragic death, more specifically, mentioning my funeral.
"there was a funeral rumrumtiger?"
rumrumtiger by rumrumtiger May 23, 2021
Used to describe the runny, splattery, and gassy shits, usually experienced after a long night of consuming rum and cokes.
Wow, I’ve got a real bad case of rum bum today, I’ve gone shit three times in the last hour!
Rum Bum by venom363 October 19, 2006
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."
Rugbum by gentaXY February 10, 2009