It was the most 'memorable' line of the play.
She gave a 'memorable' performance.
a 'memorable' vacation/experience
(..) Where do you look? No. Look down, they know you're lying . Up, and you don't know the truth. Don't use seven words if four will do. Be specific, but not memorable. Be funny, but don't make him laugh. He's got to like you, then forget you once you leave. And, for God's sake, whatever you do, don't-- (..)2001 Ocean's Eleven