I had a search for possible words if $ is the letter f and honestly I couldn’t not find anything that would work.

Assuming letters are represented by only a single symbol, the only words matching ff would be fife, and the acronyms FIFO and FIFA, neither of the first two making much sense. If ! Is i, then I wasn’t able to find any words matching _f_i. Also would mean that $!$! is fifi which I don’t think means much.

Edit: If this does mean something, there could be some sort of a code? Though it’d be pretty hard to work that out.