To cause to open in slits or chinks; to split; to cause the skin of to crack or become rough.
- To cause (the skin) to roughen, redden, or crack, especially as a result of cold or exposure: The headwind chapped the cyclist's lips.
- To split or become rough and sore: skin that chaps easily in winter.
- A sore roughening or splitting of the skin, caused especially by cold or exposure.
- Informal A man or boy; a fellow.