Ducaine
The platonic (or imagined romantic) relationship between CSI Miami characters Horatio Caine and Calleigh Duquesne. Derived from their surnames (as 'Duquesne' is pronounced 'Du-kayne')
"I'm a huge Ducaine fan, do you think they'll ever get together on the show?"
Ducain
The most awesome Halo tricker ever. The word is now used as an adjective describing something totally incredible.
Did you see that trick?! That was so Ducain!