when browsing someone's facebook profile and accidentally "like" a status or post.
Oh sorry dude, it was an accidentalike
The act of unintentionally clicking one of the "Like" buttons which are often featured on websites or listed with search engine results. "Like" buttons, intended to propagate word of mouth marketing via social network integration, are often strategically placed on webpages so that a visitor can accidentally activate it without realizing, henceforth displaying their web browsing activities on the social network associated with the button.
Frank, are you really into Milli Vanilli or did you accidentalike their page? Because right now, I'm respecting you a little more.