Slab
wiktionary
From Middle English sclabbe, slabbe, of uncertain origin; possibly from *slap, related to dialectal slappel(“portion, piece”), along with slape(“slippery”), sleip(“smooth piece of timber”), borrowed through Old Norse sleipr from Proto-Germanic *slaipaz, from Proto-Indo-European *(s)leyb-. See also Norwegian sleip(“slippery”) and Icelandic sleipur.
Compare Goidelic and Irish slaib(“mud, mire left on a river strand”), and English slop(“puddle”).
Acronym of Slow, Loud And Bangin'. This term been popularized through the southern rap genre of hip-hop, most notably by rappers such as Paul Wall, Chamillionaire, Lil' Keke, and others.
etymonline
slab (n.)
late 13c., "large, flat mass," of unknown origin, possibly related to Old French escopel, escalpe "thin fragment of wood," which according to Klein is possibly a Gaulish word (compare Breton scolp, Welsh ysgolp "splinter, chip"). But OED rejects this on formal grounds. Meaning "rectangular block of pre-cast concrete used in building" is from 1927. Slab-sided is "having flat sides like slabs," hence "tall and lank" (1817, American English).
