What is Trilogy?
1.
A series of three, many times being relevant to movies, books, plays, etc.
Hey, yo, Werty man, wanna' go watch the star wars trilogy? They've got two Trilogies, actually.
*Gasp* Two trilogies? That's like a seisology!
See
2.
When you fart three times in succession. Preferably smelly.
Dude! I just made a trilogy!
See