1. An individual who jangs a lot of poon.
2. An asshole; someone who makes plans then never keeps them, moves your things then doesn't tell you, talks a lot but never listens, spends a lot but never shares, finds ways to make your day worse, and brings the atmosphere of a mental hell on earth into your daily life.
3. Someone who sucks copious amounts of dicks.
4. To beat around the bush.
Person 2: Ya bro, he's such a poonjanger. Always poonjanging around and never giving us a straight answer.