Metasyntactic Variables (aka Placeholder Names)

Scroll down to the "Result" section below to grab a set of placeholder names in various formats

From Wikipedia

In computer science, programmers use metasyntactic variables to describe a placeholder name or an alias term commonly used to denote the subject matter under discussion or an arbitrary member of a class of things under discussion.

The use of a metasyntactic variable is helpful in freeing a programmer from creating a logically named variable, which is often useful when creating or teaching examples of an algorithm. The word "foo" is the principal example. It occurs in over 330 RFCs. The word "bar" occurs in over 290.

Some Examples