The nick completer is highly configurable, allowing you to decorate the nick in almost any way you want. It will trigger if you type any part of someone's nick, for example someone with the nick "[user]", you could type "use," and it will match. If more than one nick matches, the script will ask you to choose. You can also change the trigger, and specify words to ignore so you could type "no," and it won't complete it to a nick.