When you and a buddie use the same hole on a girl he's your tunnel buddie
Like billy is my tunnel buddie
by Christmas eve February 11, 2014
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When two gay men share a chronic addiction to anal fornication. Habituation of anal sex will eventually scar one's anus, marking one as a permanent "Tunnel-buddy."
"Oi, faggot, I heard you were officially labeled as a Tunnel-buddy by Anderson Cooper."
by xingm8y May 5, 2014
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When you and your bro have both taken down the same chick via both tunnels (vaginally and anally).
“Bro! Are you my double tunnel buddy?”

“Don’t even tell me you double tunneled with that Lindsay chick, bro”
by BuffyTheManSlayer September 16, 2018
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If your friend has a girlfriend, and his girlfriend slept with his sister, and you sleep with his sister. you are now Bluetooth Tunnel Buddies with your friend
hey you know my buddy matt? I am his Bluetooth Tunnel Buddy
by florida stanley February 21, 2020
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