A brown tunnel is when a girl takes a shit then forces it into her vagina using her hands then gets a guy to plow her getting brown balls , variants include licking it out and shit swapping. The shit acts as lube for a very pleasurable experience.
Also called brown flume.
Also called brown flume.
by browntown2 January 10, 2011
Get the Brown Tunnelmug. by Dylan Swistak February 6, 2008
Get the Brown Tunnel FLoodmug.