Is calling a japanese person a jap derogatory?

@wildbill83 I hear ya. I once worked with a Vietnamese named Sum Yung Gai. Everyone pronounced it right but settled for just calling him Yung. This other Asian engineer's name was Saka Moko which translates from Spanish as 'remove boogers'. Us Mexican American fellas just laughed whenever he showed up. It was like [i]uh-oh, here comes boogers[/i].

@DudeistPriest still laugh every time I see this...

@wildbill83