An illegal underground sex move where a man approaches a female in a group of friends, generally at a bar. After failing to hook up, the man walks away, then waits for her to be separated from her party. Once alone, he proceeds to knock her out and have his way. Once finished, he quietly returns her to the bar, so she wakes up seamlessly to her friends, as though nothing happened.
by darthdrg July 7, 2009
An STD that causes men to jizz caterpillar eggs. The eggs later hatch and the butterflies fly out of the vagina.
"Hey Samantha, why are you going to the doctor?"
"I think Brad gave me the butterfly effect, I've got butterflies in my stomach!"
"I think Brad gave me the butterfly effect, I've got butterflies in my stomach!"
by The soggy tomato February 19, 2018
In chaos theory, the butterfly effect is the sensitive dependence on initial conditions in which a small change in one state of a deterministic nonlinear system can result in large differences in a later state.1
The term, closely associated with the work of Edward Lorenz, is derived from the metaphorical example of the details of a tornado (the exact time of formation, the exact path taken) being influenced by minor perturbations such as the flapping of the wings of a distant butterfly several weeks earlier. Lorenz discovered the effect when he observed that runs of his weather model with initial condition data that was rounded in a seemingly inconsequential manner would fail to reproduce the results of runs with the unrounded initial condition data. A very small change in initial conditions had created a significantly different outcome.
The term, closely associated with the work of Edward Lorenz, is derived from the metaphorical example of the details of a tornado (the exact time of formation, the exact path taken) being influenced by minor perturbations such as the flapping of the wings of a distant butterfly several weeks earlier. Lorenz discovered the effect when he observed that runs of his weather model with initial condition data that was rounded in a seemingly inconsequential manner would fail to reproduce the results of runs with the unrounded initial condition data. A very small change in initial conditions had created a significantly different outcome.
Butterfly effect 🦋
by ... Zjdbckdnznsjd September 23, 2019
Kane: I had Sydney over last night
Isaac: oh yeah what happened
Kane: not much just a cheeky bit of butterfly effect
Isaac: oh yeah what happened
Kane: not much just a cheeky bit of butterfly effect
by Taxidriver1976 November 3, 2016
by tel February 16, 2005
by TheWiggidy May 8, 2004
by Mister Ignorant May 11, 2004