A sprinkle genie is an individual who patrols bars or parties looking for abandoned drinks they can consume due to their own lack of booze or money. This behavior is frowned upon and often people will pull pranks on these individuals by contaminating drinks or drink cups.
He's wizzing in a cup, waiting for a sprinkle genie to come and drink it up.
When lacking a decent place to enjoy alcoholic beverages free from interference, road fishing is a final option. This act consists of driving around the countryside with a cooler full of beverages, allowing all passengers to 'fish' out and enjoy drinks hidden from public view. Road Fishing is only recommended in rural settings.
"Dave's parents shut down tonight's plan for a party, so we're just going to go road fishing until something new comes up."