From the zippy.readme :
Name of the file Zippy looks in for sayings when -zt is set.
Default: yow.lines. File format: There must be a single ^
character or null character (control-@, ASCII code \000) after
In the winboard directory, I created a file called "yow.lines".
Inside, here is a sample :
This is a sample zippy.lines file for xboard/WinBoard 4.0.4 or later.
Text before the first caret, like this text, is a comment.
Hello Mr Bean !
Any similarity between you and human is purely coincidental
For windows, I still use the original winboard 4.2.7 from Tim Mann.