Backslap rhymes with:
burlap, overlap, ascap, automap, belnap, bootstrap, burlap, catnap, corcap, dimetapp, flytrap, handicap, hubcap, kidnap, kneecap, lightcap, madcap, midcap, millsap, milsap, mishap, mousetrap, overlap, realcap, recap, roadcap, rocap, skycap, smallcap, stopgap, westcap, wiretap, yonhap
Backslap sounds like:
bacigalupi, bacigalupo, bookshelf