56k warning

An internetism that would warn users that what ever they were going to open would slow down their connection, such as a ton of pictures. However, since only 10% of Americans use dial up anymore, the term is of a general use to prenote that there is going to be a lot of content.

A "56k Warning" is a nice way of telling someone they might stand a chance of a black hole opening up inside of their home if they use dialup and try to access a site bogged down with images or videos.

Basically if you're in that 16% of people who use dialup, you need to watch out for these.