[amputect]

The other answer to this is correct, but a little more detail in case you're interested:

^W is a control code. This specific one represents the keys ctrl+w, a keyboard command in Vi and Bash among other things. It deletes the previous word. You often see something similar with ^H as well, which is a single-character backspace. https://en.wikipedia.org/wiki/Backspace#^W_and_^U has some more information about these.

Some people use them more to make visual jokes in written text, more or less the same way you'd use strikethrough formatting in text.

[IIsi50MHz]

And in my experience ties in nicely with the fact that when a dumb terminal glitched or lost sync with the server, control codes would start to litter the screen instead of being interpretted. You'd see things like:

…thsi typo^Ŵ^H^H…

start to appear, sometimes followed by several random letters hit in frustration, before the final hard-reset of the terminal and resignation to the fact some unsaved work has been lost.

[razodactyl]

I wish there were more people like you on the internet.