hammercocking 

The act of whacking someone so hard with ones erect penis it leaves sizeable marks and redness and warmth and possible bruises.

I knight you my fair lady, now scooch down for your hammercocking so I can officialise it.

hammercocking by Adie88 September 29, 2018

hammerfucking 

When someone on a crotch rocket rolls off the throttle, clutches in, shifts then dumps the clutch and rolls onto the throttle hard. All within a 1 second timeframe.

"See that guy switching gears? he's really hammerfucking it"

motorcycle crotch rocket shifting hammerfucking

hammerfucking by xECGx April 24, 2014