One obtaining a nosh off or blow job from someone in otherwise shady conditions such as on the back seat of a bus or in the boardroom of a fully manned office. Seedy goobles are both risky and dangerous but this only adds to the fun of getting a seedy gobble.
Hey Barron, I was at my old nans on Tuesday redecorating her bedroom. While she was in the next room her best friend pulled my pants down and gave me a seedy gooble
I was on the number 19 on the way home the other day and the missus unzipped my flies and gave me a seedy gobble on the bus!
I once worked in a bar and a well known comedian came in for a few drinks. I ended up giving him a seedy gobble in my car.