When you get head from a fish in your gypsy caravan park on the outskirts of scunthorpe
Person 1 'Do you want to go out this weekend'
Person 2 ' nah busy doing a dirty prime'
The act of squishing tuna in your dick hole then proceed to fuck a woman only going in an inch and using the tuna oil as a lubricant
Person 1 ' sure you have alot of tuna '
Person 2 ' yeah doing a dirty inchley'