Flap rhymes with:
clap, clapp, klapp, lap, lapp, lappe, slap, app, cap, capp, chap, chapp, clap, clapp, crap, dapp, entrap, frap, gap, gapp, giap, hap, happ, happe, jap, kapp, klapp, knapp, krapp, lap, lapp, lappe, map, mapp, nap, napp, pap, papp, rap, rapp, rappe, sap, sapp, schapp, schnapp, scrap, shap, shapp, slap, snap, snapp, stapp, strap, tap, tapp, tappe, trap, trapp, trappe, unwrap, wrap, yap, yapp, zap, zapp
Flap sounds like:
falb, falbo, falloff, falvey, falvo, felipe, filby, filip, filipa, filippi, filippo, fillip, flab, flabby, flahive, flavia, flavio, flip, flippo, flop, floppy, fluff, fluffy, flyby, followup, fullilove, fulop, fulp, fulvia