chunky waterfall 

Noun - The act of getting a blowjob and the girl/guy throws up on your dick.

Verb - To give someone a chunky waterfall (see above)

"Hey Trent, I'm so hungover right now. Don't make me blow you or I might give you a chunky waterfall."

chunky waterfall by schoolglue1234 September 6, 2014

Double Chunk Waterfall 

When a girl is giving you head, and right before you cum you push your wang to the back of her throat, making her gag, but blocking her mouth, so vomit comes out her nose and runs off your balls, like 2 chunky waterfalls.

Man i can't wait to get off work so i can give my girl the Double Chunk Waterfall

Double Chunk Waterfall by NateMac June 15, 2006

Chocolate Chunk Waterfall 

The aftermath of anal sex when the recipient has diarrhea

Man sally hit me with the Chocolate Chunk Waterfall last night.

Chocolate Chunk Waterfall by RushJ October 7, 2007