Foxtrot: Underpinnings/underpants. A lot of little boys wear underpants featuring their favorite character. (Spongebob, Superman, Spiderman, etc.) Jason’s just happen to be for a very complex computer operating system, which given his intelligence, is appropriate. My husband works with Unix and Unidata. I don’t know many 10 year olds who would understand it, let alone celebrate it.