Top definition
When a girl is sitting down to piss and a dude stands in front of her and also pisses. While he is peeing his piss stream merges into her piss stream creating a "dual fountain" aka a downtain.
The line to the men's room was ridiculous so I went into the girls bathroom and made a downtain with this drunk chick!
by sorryimnotsorry June 22, 2011
Get the mug
Get a downtain mug for your sister-in-law Riley.