slap
Cross references: 1. strike 1. slap \'slap\ n [ME slop, fr. MD; akin to MD slippen to slip] dial Brit 1: a pass or notch between hills dial Brit 2: OPENING, BREACH 2. slap n [LG slapp, of imit. origin] 1a: a blow with the open hand 1b: a quick sharp blow 2: a noise like that of a slap; specif : a noise resulting from pla y or slackness between parts of a machine 3: REBUFF, INSULT 3. slap vt or slapped; or slap.ping 1: to strike with or as if with the open hand 2: to put, place, or throw with careless haste or force 3: to assail verbally : INSULT 4. slap av [prob. fr. LG slapp, fr. slapp, n.] : DIRECTLY, SMACK
Webster's English Dictionary