<p><strong>Noun</strong></p><ul><li>the juice or vital circulating fluid of a plant, especially of a woody plant.</li><li>any vital body fluid.</li><li>energy; vitality.</li><li>sapwood.</li><li>Slang: a fool; sucker; dupe.</li><li>Metallurgy: soft metal at the core of a bar of blister steel.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) sapped, sap·ping: to drain the sap from.</li></ul>