jason met een frikandel special die slap in zijn broek hangt

Jason with a special Dutch sausage, a "Frikandel Speciaal", limply hanging in his pocket. Note: The term "Frikandel Speciaal" refers to a specific Dutch fast food dish consisting of a deep-fried minced meat hot dog slathered in a mixture of mayonnaise, curry ketchup and diced onions. The metaphorical meaning attached with 'slap in zijn broek hangt' may refer to a funny, awkward, or otherwise notable element added to the scene. Thus, in this context it literally refers to a Frikandel Speciaal being in a pocket, as that makes sense visually and follows the phrase most directly.