I will never hear or see this word again without thinking of this joke.
I was at my bank today; there was a short line. There was just one lady in front of me, an Asian lady who was trying to exchange yen for dollars. It was obvious she was a little irritated . . . She asked the teller, "Why it change? Yesterday, I get two hunat dolla fo yen. Today I only get hunat eighty? Why it change?"
The teller shrugged his shoulders and said, "Fluctuations." The Asian lady says, "Fluc you white people too".