Short for Wibbly-Wobbly, Timey-Wimey, Spacey-Wacey.
From
Doctor Who.
Used to quickly tell people who aren't geniuses that science is
happening and trying to explain it would result in such profound techno-babble as to be
incomprehensible.
The Doctor: People assume that time is a strict progression of cause to effect, but *actually* from a non-linear, non-subjective viewpoint - it's more like a big ball of
wibbly wobbly... timey-wimey... stuff.
Amy: It's spacey-wacey, isn't it?
The Doctor: Well, actually, it's because the Time Lords
discovered that if you take an eleventh-dimensional matrix and fold it into a
mechanical... Yes, it's spacey-wacey!