a company with a funny duck who says aflac as a slogan. aflac as an interjection can be used as well when you can't think of something to say, but you know you should talk.
a good interjection for when someone is talking about something you don't want to hear about, or when you can't think of something to say. sounds almost like a duck when said.
#1: so then I saw funny colored puss coming out of my dick and...
#2: mak mak mak mak! on to more not-STD related crap.