The act of inserting a
funnel into ones anus, whilst shitting through it into another persons
mouth, straining the nutrients and waterier contents of the shit. Variations may involve the addition of a
liquid such as urine for easier consumption.
Person 1: Fuck dude, I'm feeling so queazy right now, I think my shitters gonna blow.
Person 2: Well don't just
waste it in your undies dude, want to do a Tunnel Funnel?
Person 1: I'm down for a good
old Tunnel Funnel. Thanks
man, your the best older brother ever.