from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An erotic dance that a stripper performs while straddling a customer's lap.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A very erotic form of entertainment, typically at a men's club, where a naked or nearly-nude performer straddles a customer and moves in a rhythmic, sexual manner over his or her lap.
- v. To perform a lap dance.
From lap + dance. (Wiktionary)