drape (v.)
c.1400, "to ornament with cloth hangings;" mid-15c., "to weave into cloth," from Old French draper "to weave, make cloth" (13c.), from drap "cloth, piece of cloth, sheet, bandage," from Late Latin drapus, perhaps of Gaulish origin (compare Old Irish drapih "mantle, garment"). Meaning "to cover with drapery" is from 1847. Meaning "to cause to hang or stretch out loosely or carelessly" is from 1943. Related: Draped; draping.
drape (n.)
1660s, from drape (v.). Jive talk slang for "suit of clothes" is attested from 1945.