When the fly to your trouser is unzipped
The barn door is open.
Oops, let me zip it up.
Phrase implying that someone's pants zipper is unzipped.
"Dude, your barn door is open and I can see your pink underwear!"
40๐ 19๐
Used casually to slip into conversation that the zip on someone's trousers is unfastened, prompting them to do it up.
Rob: 'Jake, you've got a barn door open.'
Jake: 'What's that?'
Rob: 'The zip on your trousers is undone.'
Jake: 'Oh, thanks' (Fastens zip up)
A phrase used to describe when someoneโs pants zipper is down; because in the barn door is the hog (penis).
โHey Jimmy your barn door is open!โ