The move used to counter a Mavin Street Masturbation Manoeuvre. The act involves getting inebriated and then sitting on the toilet, releasing liquid excrement from the anus while vomiting into the sink.
Bro 1: ‘I feel very I’ll’
Bro 2: ‘ he’s definitely gonna do a Mavin Street Double Barrel Discharge’
Bro 3: ‘wow the rats are going to wish they didn’t live in our sewer!’