slat
1. slat \'slat\ n [ME, slate, fr. MF esclat splinter, fr. OF, fr. esclater to burst,]splinter 1: a thin narrow flat strip esp. of wood or metal : as 1a: LATH 1b: LOUVER 1c: STAVE 1d: one of the thin flat members in the back of a ladder-back chair pl, slang 2a: BUTTOCKS 2b: RIBS - slat aj 2. slat vt or slat.ted; or slat.ting : to make or equip with slats 3. slat vt or slat.ted; or slat.ting [prob. of Scand origin; akin to ON sletta to slap, throw] dial Eng 1: to hurl or throw smartly dial Eng 2: STRIKE, PUMMEL
Webster's English Dictionary