Acronym replacer feature

I’m using Joel Bennett’s acronym replacer plugin and have a question – is it possible, when listing the acronyms to be replaced, to set it so the text output itself is changed? I ask because I primarily use my acronym replacer for nicknames, and if someone is nicknamed something hella long, I don’t want to have to type that out every time. I would like to be able to type :Josh: and have it output *insert nickname here* (no asterisks, of course) as an acronym. Is this doable?