The friend who is unencumbered or reserved, completely open and honest with any personal information as well as personal preferences. They often demonstrate that by stepping over the line and providing Too Much Information.
After spending some time together on a car ride sarah went from being a friend to an unfiltered friend; I know too much about her.
"Unfiltered Friendship" is a deep and authentic bond between individuals where they openly share their thoughts, feelings, and experiences, including uncomfortable or personal aspects, fostering a strong connection built on honesty and vulnerability.
"Sarah and Alex's unfiltered friendship was evident in their willingness to discuss their fantasies, sexual exploits, fears, and even past mistakes without holding back."