sparkling_sweat
When there's a sparkle effect around a character that's sweating (post #4961776), or when a sparkle effect is drawn over the sweat (post #4254581)
Could also apply if the sweat is rendered to look like it's glowing or sparkly.
See also
* hot
* sauna
* shiny skin
* sparkling sweat
* sweaty clothes
* wiping sweat
* sweat for light sweating
* very sweaty for heavy sweating