the edible fruit of the passionflower, Passiflora incarnata, of the southern U.S.
the plant itself.
South Midland and Southern U.S. May apple.
Origin of maypop
1850–55, Americanism; probably taboo deformation of earlier maycock, earlier maracock, perhaps < Virginia Algonquian
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019