Particular to this project 'hack' in CSS generally refers to literally adding hacks in to force something to work, it's not a synonym for tinkering. If the whole project is chock-full of `! important` statements and specific `-moz/-webkit/-ie` prefixes to selectively cover specific bugs, then maybe it would be well-named (if horrific). I get why it's called 'hack', but given that in the context of CSS, 'hack' is almost always perjorative – referring to awful, unclean things you do to bend CSS styling to your will – it's not a very good name.

It's a name which is confusing and difficult to search - almost as bad as calling the (Haskell) build tool 'stack', but with added negative connotations.

Sounds like a messy stuff hacked together in an hour :) Definitely funny and catchy though.

Because there is a programming language (PHP dialect) called that.