In short a dutch tulip is when someone has a rectal prolapse.
The long version...
The history of the dutch tulip mimics a common scenario faced by a woman and her butthole when in a relationship with a man. In the early 1600's(early part of the relationship) the tulip(butthole) experiences a tulip mania(the guy wants her butthole) for reasons unknown(for reasons unknown) and everyone buys tulips(they try anal) then the price of the Dutch Tulip goes really high(they start sticking all kinds of things in her butthole). Not long after the price of the tulip goes to astronomical heights(think butthole fisting) the price floor of the tulip collapses(the rectal prolapse occurs) ruining many dutch investors(her butt hurts and she gets dumped).
I've been hammering bae's butthole a lot lately and last night I gave her a Dutch Tulip.
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).