Template:U/doc

This template is used as such: Tmtoulouse which produces Tmtoulouse.

There is an optional second parameter that allows you to change the displayed name ( Bohdan becomes Sumtxt).

This is an excellent template for the terminally lazy, since it saves at least seven keystrokes per use, or can make the difficulty of typing "unsigned" a distant memory.

Even shorter is User:example (note the pipe "|" before the closing brackets), which gets automagically replaced by example.