Brolly-whopping : the act of inserting an umbrella into the anus, follwed by repeated opening and closing of the parasol.
The term can be used when speaking of beach parasols as well as umbrellas.
Origin : sexual fetish/punishment of German descent.
1. "I've just been brolly-whopped."
2. "This pornography movie would be vastly improved by the addition of a brolly-whopping scene."
3. "I fancy a brolly-whopping."
Can also be used as a threat, ie:
1. "Shut the hell up, lest I give you a brolly-whopping."