4 definitions by CaptainInnuendo

When you take a dump so large and exhausting that it takes a while for your anus to fully return to full tension.
There is a danger of water getting in if you leave your porthole open
Holy f**k that was a tough one, I think I have an open porthole
I better not take a bath, I might fill up
by CaptainInnuendo August 8, 2017
Get the Open Porthole mug.
The act of announcing to anyone in the room to not enter the toilets for a specified length of time after taking a particularly heinous dump
Person 1: I'd give that about 20 minutes guys, I just deported some Romanians

Person 2: Thanks for the fallout warning
by CaptainInnuendo August 8, 2017
Get the Fallout Warning mug.