Swab \Swab\, v. t. [imp. & p. p. {Swabbed}; p. pr. & vb. n. {Swabbing}.] [See {Swabber}, n.] To clean with a mop or swab; to wipe when very wet, as after washing; as, to swab the desk of a ship. [Spelt also {swob}.] [1913 Webster]