mountain dewing 

The act of shooting one's sperm in a projectile fashion down a girl's throat, so as not to get STD's, much like waterfalling for water bottles.

Dude, Bobby had the clap so he was mountain dewing Caitlyn last weekend. I wonder if he hit the bullseye?

mountain dewing by Pete Zahutt June 8, 2007

mountain dewing 

When sweat runs in between a girl's boobs.

Becky: It's so hot out!
Jen: I know I'm mountain dewing!

mountain dewing by SlothzRuleBitch. June 1, 2013

dewing the mountain 

using mountain dew as an anti spermacide during intercourse

dewing the mountain is when you and you girlfriend are about to have sex except shees not on the pill and your out of condoms so before penetration you pour mountain dew on your dick and in her vagina then u fuck her safe sex in a can

dewing the mountain

dewing the mountain by E J T D August 17, 2011