The given tag "sma" may not have a specific English meaning in the context of porn video tags. It could possibly be a misspelling or abbreviation. However, based on its similarity to other terms, it might be referring to "small," which typically means:
1. Female performer with a smaller body size or stature.
2. Scene involving small objects, like toys or props.
3. Scene set in a smaller location or environment.
4. Performance focused on intimate, close-up action.
Please provide more context if you need a clearer explanation.