foo and bar. Since there's no meaning behind naming functions/variables just yet, I use some combination of Foo and/or Bar with whatever I'm trying to define.

It makes it easy to search/find later on when I do have a better understanding of what it should be named.

Also see Foobar on wikipedia.

The terms foobar, foo, bar, and baz are sometimes used as placeholder names (also referred to as metasyntactic variables) in computer programming or computer-related documentation. They have been used to name entities such as variables, functions, and commands whose purpose is unimportant and serve only to demonstrate a concept. The words themselves have no meaning in this usage. Foobar is sometimes used alone; foo, bar, and baz are sometimes used in that order, when multiple entities are needed.