A weather condition consisting of drizzle, light rain or snow, amounting to minimal measurable precipitation accumulation in a 24 hour time period <.1".
Used primarily by those visiting Pittsburgh during traditional collegiate school sessions - September - May, as this is the predominant weather pattern for those months.
Joe: Hey Tim how's the weather today.
Tim: It's Pittsburghing.
Joe: I wish it would either rain or not, the constant Pittsburghing is dreary.