slaggy

1. (of a material) Resembling or containing slag.Examples: "1834, Robert Allan, Abstract of a Paper accompanying a Suite of Volcanic Rocks from the Lipari Islands, Transactions of the Royal Society of Edinburgh, Volume 12, 531, Some portions of this obsidian are less compact, and in No, 2. we remark indications of a more slaggy structure, with several white veins intersecting the black surface in a very beautiful manner."; "From here to the summit the slope steepens to an angle of 20° to 30°, and the rock becomes harder and more slaggy."; "1949, Council of Scientific and Industrial Research (N.Z.), New Zealand Journal of Science and Technology: General Research Section, Volume 31, unidentified page, In the more slaggy parts of the sheet pale yellowish natural porcelain is found both fused to blocks of basalt and as large lumps in the filling."

2. (UK, Australia, New Zealand, Ireland, derogatory) Resembling or characteristic of a slag; slutty, promiscuous.Examples: "2005, Maria Beaumont, MissFit, Arrow Books, UK, page 175, This evening I′ve been the cheapest, slaggiest slag ever."AustraliaIrelandNew-ZealandUKderogatory