The double entendre figure of speech referring to the process of actually clearing your computer history/cookies and a masturbation session that results in an orgasm.
Im sorry im late for drinks guys, but i was "clearing my history".
My wife and kids were home, i was rapidly "clearing my history".
1. The act of erasing all evidence of wrong-doing. A metaphor based on the common custom of clearing one's browser history on a computer after watching porn.
2. or more literally, erasing the viewable browser history of a computer to hide the fact that you just watched porn.
Dominic: "Dude, I didn't do the Algebra II homework last night, so I did it all over lunch"
Ben: "When it comes to clearing your browser history, you work faster than anyone I know."