What lean and slippered pantaloon mean?

"Lean and slippered pantaloon" is a phrase from Shakespeare's play "As You Like It," specifically from a speech by the character Jaques. It describes an old man who is thin ("lean") and dressed in loose-fitting trousers ("pantaloon"), typically associated with a humorous or pathetic image of aging. The term highlights the physical decline and the vulnerability of the elderly, evoking a sense of both comedy and melancholy in the context of life's stages.