·noun The act or process of raising a nap, as on cloth.
II. Napping ·p.pr. & ·vb.n. of Nap.
III. Napping ·noun A sheet of partially felted fur before it is united to the hat body.
To take any one napping; i.e. to come upon him unexpectedly, to find him asleep: as, He caught him n...
Dictionary of The Vulgar Tongue by Francis Grose