LBS
Liquid Bum Squirt regularly occurs in the older generation should the physically exert themselves for extended periods of time. A mixture of sweat and poo builds up in the arse crack creating a diluted brown stain on his/her shorts. Sometimes can be seen trickling down ones leg.
Guy 1 - Bloody hell have you seen Gregs LBS?

Guy 2 - His wife won't be happy, she'll have to wash his shorts

for the 3rd time this week!

Guy 1 - Yeh, why does he even wear shorts to chess club

anyway?