The given tag "big-bar" seems to have a typo, as it appears to combine two separate tags: "big" and "bar". In the context of adult content, here is their meaning:
1. Big - In this context, 'big' refers to larger than average body parts or features, typically referring to the penis size in male performers. This tag indicates that a video features performers with larger-than-average penises.
2. Bar - A bar is a place where alcoholic beverages are served and people gather for socializing. In adult content context, it refers to a scene or video taking place in a bar setting. The performers may engage in various sexual activities within the bar environment.
So, if we combine both meanings, "big-bar" could potentially be referring to a porn video featuring performers with large body parts, particularly penises, engaging in sexual activity in a bar setting.