Runny stool that strikes when least expected as a result of drinking copious amount of rum the night before.
Bro 1: "I drank so much Ron last night...
*feeling of your ass about to fall out your leather cheerio*
I think I have the runs..."
Bro 2: "Nah bruh, you have the rums."
*feeling of your ass about to fall out your leather cheerio*
I think I have the runs..."
Bro 2: "Nah bruh, you have the rums."
by Phebreeze November 30, 2011
Get the Rumsmug. 
...But why is the rum gone?
by Intelligence001 November 13, 2016
Get the Rummug. 
Rumming is running a half marathon, eating french toast, rubbing your belly, and thinking about adult beverages.
The three of us were rumming today. While the elder rummed the first part faster, the junior rummed the second part slower, and the middle is always rumming about the third part.
by six tunnels March 13, 2010
Get the rummingmug. adj (dated Br inf) peculiar; odd: He's a rum character (Oxford Advanced Learner's Dictionary (OALD).
Rum how he'd had a feeling it was coming, all the same, he thought, still staring into the blurred plain. (John le Carré: The Honurable Schoolboy, Coronet Books, 2000, p.55).
by Petyush March 27, 2005
Get the rummug. meaning can be used to describe a person in a good or bad way depending on the context like Bo Selecta.
RUM LAD OR RUMMER
RUM LAD OR RUMMER
by Bonkers May 19, 2004
Get the rummug.