When you hold your friend’s bare ass over the chimney of an abandoned house and kick the chimney, causing bats to evacuate from the fireplace below. This causes the bats to fly into and then thrash around wildly in your friend’s unguarded anal cavity. Lube is not recommended as it allows too many bats to enter, causing severe damage to the colon.
Yo bro, I heard Riley’s still in the ICU after that Arizona Bat Tunnel last weekend. One of the nurses said his prostate completely ruptured!
by Big Daddy Hambone May 3, 2024

a tunnel groundhogs use to see if it's cold outside and/or see if it's still winter. it's also where british people eat stinky fish and chips before heading to the orthodontist
by lc2401 September 8, 2010

a medical condition resulting in numbness and possible paralysis in the thumbs and wrists from excessive texting or Blackberry use.
by Peeper1818 February 4, 2010

The act of a man shoving his arm in his ladies anus, elbow deep. Upon pulling it out, one will create the illusion of a tunnel for an asshole.
Melvin: Hey Geoffrey what is the matter? Your arm looks at little sore...
Geoffrey: Yah its sore Melvin, I had a serious case of Tunnel Arm last night.
Geoffrey: Yah its sore Melvin, I had a serious case of Tunnel Arm last night.
by A. Giacs September 9, 2018

by qball da blumpkin king September 21, 2019

by Tunnel_lover March 27, 2025

Drunk as fuck! Like to the point where you only care about yourself and how you are going to get more beer.
"Dude, Josh was definitely in a tunnel last night!"
"I know, he was so unbelievably wasted"
"Stop acting dumb, you're in a tunnel tonight"
"I am not i just want beer"
"I know, he was so unbelievably wasted"
"Stop acting dumb, you're in a tunnel tonight"
"I am not i just want beer"
by welldamnthatsalowprice July 31, 2013
