Brown Binning
The act of engaging in an unnatural act in a garden or other outside space.
'I was brown binning the girlfriend the other day when a party of ramblers discovered us in our compromised position so I whipped it out and jizzed on her back'
take the brown bin out
To go for a dump. Drop the kids off at the pool. Light a bum cigar. To lay a brown egg
“I’ll be back in a minute babe, I’m just going to take the brown bin out. And I’ll wash my hands when I’m done”