Does anyone else get a bunch of keywords which are not actually on your site?

I log in to webmaster tools and click "your site on the web" and then "keywords".... I have a performance car parts website and I see keywords like acyclovir, furosemide, bactrim, augmentin, and "blackjack"???

What gives? I don't have any of these keywords written anywhere on my site.
Are these keywords used in searches that accompany keywords that ARE on my site?

Thank you to anyone who helps me make sense of this.

Well I logged into Google's Webmaster Tools and looked at one of my sites. It gave me about 200 keywords it says is the most common keywords that it found on my site. So they must be showing up somewhere on your site.

It could also be that the robot is combining words although I didn't see any evidence of that in my control panel.

just referrer spam bots