An initialism for "why are boys so fucking confusing." This has become a bit of an outcry from the world's population of teenage girls. When a boy does something to make a girl think one thing about him, and then does something else that makes her think the exact opposite of what she just thought, WABSFC will most likely be one of the first thoughts to enter her head, and the first words out of her mouth.
by lesmots March 28, 2010