To erotically explore your partner's anus with a finger. Akin to the legend of the little Dutch boy poking his finger in the dike.
Sonja let out a squeal when Barry surprised her with a Dirty Dutchman. He was mid-knuckle deep before she knew what was happening.
by Eaton Holgoode May 16, 2016
When you stand on a ledge and hold your partner over the ledge(the plank) by their ankles and fuck them in their ass while wearing a pirate hat. When you are pleased you drop them off the ledge(making them walk the plank).
by Mjack420 October 14, 2014
This is a sexual act involving three woman laying down in the shape of a triangle. The first woman menstrates into the second woman's mouth. The second woman then chokes up the menstration through her nose into the third woman's anus. The third woman then squirts the menstration from her anus back into the first woman's vagina.
"Instead of putting your finger down your throat to throw up, just grab a few chicks and tell 'em to try out the dirty dutchman trifecta. That should do the trick."
by Joseph Von Hedberg September 4, 2008