I came across a great couple of words yesterday: Treknobabble is a nonsensical but technical-sounding explanation used, for example in a science fiction work such as Star Trek (though many other works use the device too). The lovely term "Wantum Physics" describes the same thing (i.e. physics that will do whatever the author wants it to do for plot purposes). Either way, it is a well-used device to plug a plot hole ("Why don't we just go back in time and prevent it from happening?" "But if we did that, the quantum overload will gegauss the flux capacitor and cause an abilene paradox"). Or it can yank the characters out of what has been set up as certain doom ("Wait a minute! What if we reverse the polarity and cross the streams?!").
Probably it's best for treknobabble to be incomprehensible as well as nonsensical - as a teenage know-it-all doing science courses at school I remember snorting with derision at some wantum physics in Superman 2. If I remember rightly, the bad guys arrive near Earth discover their superhuman strength and theorise that it is because "our molecular densities are increasing because of the higher gravity of the Earth's sun". The problem with that is that it's too comprehensible, and so instantly dismissible as tosh. Whereas who knows what technical opportunities and restrictions there are from reversing the polar flux on the quantum overload Heisenberg defibrullator?