What term describes a spirit’s ability to create a viscous mouthfeel when swirled in a glass?

The term that describes a spirit's ability to create a viscous mouthfeel when swirled in a glass is "legs." When you swirl a spirit in a glass, it creates streaks or "legs" that run down the interior of the glass after the liquid settles. This phenomenon results from the interaction between the alcohol content, viscosity, and surface tension of the liquid. A spirit with higher alcohol content tends to show more defined legs due to its thicker, syrup-like consistency, which can suggest a richer, more full-bodied experience when consumed.

In contrast, "tears" is often used interchangeably with legs but can refer more specifically to the drops of liquid that form and fall back into the glass. "Body" refers to the overall weight and mouthfeel of the spirit on the palate, encompassing more than just the visual appearance in a glass. "Bubbles" indicate carbonation, which is not directly related to the viscosity or the visual phenomenon of legs but rather to the presence of dissolved gases.