look up any word, like cunt:

1 definition by GiraffePoacher

 
1.
When two or more males gather around a single toilet or urinal to see how many times each flow of urine overlaps until all participating males' bladders empty.
"Hey, Chad. Want to go in the bathroom and Cross the Streams? Bill and I counted to 59 last time. A new record!"
by GiraffePoacher August 15, 2011