1. Crazy or Foolish: This is the most common meaning, used to describe someone acting in a silly or irrational way.
* Example: "She's gone gaga over that new singer."
2. Enthusiastic or Excited: This meaning describes someone who is very enthusiastic about something, sometimes to an excessive degree.
* Example: "He's gaga for that new video game."
3. Elderly and Confused: This meaning is less common and can be considered offensive, as it implies that older people are confused or senile. It's better to avoid this use.
4. Slang for "Grandfather": This is a less common meaning, mainly used in the US, especially in the context of a family.
5. Informal Name: Sometimes, "Gaga" is used as a nickname or a shortened form of a name, like "Georgia."
Note: It's important to pay attention to the context and the speaker's tone to understand the intended meaning of "gaga."