what are urban-slangs that even native english people do not even understand

There are many urban slangs that can be difficult for even native English speakers to understand, as slang terms are constantly evolving and can vary by region or social group. Here are a few examples:

1. "Savage" - Used to describe someone or something that is exceptionally cool, impressive, or fearless.
2. "Fleek" - Refers to something that is perfect, flawless, or on point.
3. "Lit" - Means that something is exciting, amazing, or highly enjoyable.
4. "Woke" - Describes being aware of social and political issues, often related to racial or social justice.
5. "Tea" or "Spill the tea" - Refers to gossip or sharing juicy information.
6. "Thirsty" - Describes someone who is desperate for attention or validation, often in a romantic or sexual context.
7. "Clout" - Refers to influence, popularity, or social status.
8. "Gucci" - Means that everything is good or okay, derived from the luxury brand Gucci.
9. "Bae" - Short for "before anyone else," used to refer to a significant other or someone special.
10. "Flex" - To show off or boast about one's accomplishments or possessions.

Remember, slang terms can change quickly and may be specific to certain communities or age groups, so it's always best to ask for clarification if you come across unfamiliar slang.