The idiom on the tip of my tongue means that someone almost remembers something, such as a word or name, but cannot quite say it yet.
The expression comes from the image of a word being so close to being spoken that it seems to be sitting on the tip of their tongue, ready to come out.
The expression comes from the image of a word being so close to being spoken that it seems to be sitting on the tip of their tongue, ready to come out.
Her name is on the tip of my tongue, but I just cannot remember it.