It's totally random words in various messages, but if you hover over them,
it's a link to a search engine (not to the search facility for this site).
Seems either the site, or our PCs are compromised.
It is so called "context advertisement" guys, can't do much about it - except as noted by MeAndWifey (Nick - if I remeber correctly?) use FF with AdBlocker...
Or ask BOSS to get it out from here