What is to speak with imperfect articulation; to mispronounce, as a child learning to talk. As yet a child, nor yet a fool to fame, I lisped in numbers came. Pope called?

lisp — To speak with imperfect articulation; to mispronounce, as a child learning to talk. As yet a child, nor yet a fool to fame, I lisped in numbers came. Pope. (Webster's 1913.)