Definitions by TrevBloke

fanny whacking 

Heterosexual intercourse carried out in the missionary position between 'mutually enthusiastic' partners with sufficient vigour to generate rhythmic, audible impact of scrotum on buttocks.

He gave me such a fanny whacking last night, I bet he makes up some excuse for not cycling to work this week!

fanny whacking by TrevBloke November 6, 2010