Bum Run 

When your under legal age for purchasing controlled substances (alcohol, tobacco, etc) you go on a Bum Run. Basically its when city teens buy their alcohol from the homeless. Typically it requires a tip after you get the drink... most homeless are happy to help out!

"I got my fake taken away" "Okay, Well have to go on a bum run"

"Where did you get the alcohol?" "We had to go on a bum run"

"When we went on a bum run earlier the bum went crazy because we didn't give him enough money"

"Earlier today two bums were competing for our 'business' and they got in a fight during our bum run"

Bum Run by SummaChi Towns Finest June 7, 2009

Straight Run Bum 

In torch applied flat roofing, the guy who doesn’t do anything but straight runs of rolls.

I always get stuck doing the corners and curbs while that straight run bum takes all the easy work.

Straight Run Bum by Franklin T. May 2, 2022

Bum Runner 

A drink made by someone homeless, or soon to be homeless, combining at least 10+ different drinks that have been removed from a garbage can in a party district.

Also known amongst the homeless community as a "Sidewalk Sleeper", this is semi-common activity in Bourbon Street, New Orleans, LA.

The homeless guy made a Bum Runner on Bourbon Street as tourists laughed and photographed him in the act.

Bum Runner by Brandon "Batman" Green June 15, 2011

runny-bum 

the uncontrollable act of diahorrea in the worst form, usually from a food type that didnt agree with you or an alien food type,!

I had such an upset stomach yesterday.
I had a runny-bum all day from it!!!
runny nose

runny-bum by craigy_ March 23, 2011

Runner's Bum 

The phrase used to describe running whilst needing to excrete one's bowls, the sufferer then has 2 choices:
- clench their arse and hope for the best
- shit their pants

"Paula Radcliffe shit herself in the marathon", "oh yeah we've all had runner's bum"

Runner's Bum by Mahoganay October 12, 2013

Runners bum 

When you need to shit whilst running and you must clench your asscheeks to hold it in.

- "Hahaha Paula Radcliffe shat herself mid race", "ah, we've all had runners bum"

Runners bum by Mahoganay October 28, 2013

bumrunner

A term used while paragliding on small practice hills where you are not able to actually take off, but still able to sit back in your harness so your bum drags along the ground to the bottom of the hill.

-How was the site?
-If the winds were strong, there could be some lift, but without decent wind we were only able to do a few bumrunners.

bumrunner by Condor2008 April 13, 2009