bobby knocking 

I game or a prank younger people play which involves knocking on someones door and leaving before they answer

you wanna go bobby knocking later?

yeah sure

bobby knocking by Ian Handley September 14, 2006

Bobby Knocking 

The act of repeatedly slapping one's member against the face of one's partner during foreplay.

I was Bobby Knocking my girlfriend last night, which turned her on immensely

Bobby Knocking by Barry_2007 August 31, 2007

Bobby Knocking 

The act of repeatedly slapping one's member against the forehead or face of one's partner during foreplay.

I was Bobby knocking my girlfriend last night which turned her on immensely.

Bobby Knocking by Barrington_2007 January 2, 2009