A fetish type activity, where two people place a toilet paper roll tube between their assholes, and then one person shits into the other person.
"Man, I met this dude named Tom the other night at the bar, and we snuck into the bathroom. He let me do a flume ride on him!" - Dandy Randy W.
A fetish act, where a toilet paper roll is placed between two anuses, and one person then shits into the other. The sloppier, the better.
"Man, I met this dude named Tom at the bar the other night, and we snuck into bathroom and he let me do a flume ride on him. He had eaten tacos!" - Dandy Randy W.