Closest pal, informally

BFF

Think of the abbreviation often used in texts or social media to refer to someone you share secrets and inside jokes with.

Closest pal, informally" is a straightforward clue pointing to a casual term for a best friend. The answer "BFF" stands for "best friends forever," a widely used abbreviation in texting and social media. It’s a modern shorthand that fits the clue’s request for an informal, affectionate label for someone’s nearest friend.