Caution: This may get you sent to prison...
Dave: Hell yeah! I gave that bitch a Raspberry Ripple!
John gives Dave a high five
Raspberry being related to the noise made when blowing with tongue stuck out of mouth to simulate a 'fart' and ripple due to the rippling of the water.
"Yeh I know! It was a corker! I let off a few raspberry ripples while on the bog!"