A tree of the genus Ulmus, of several species, much used as ashade tree, particularly in America. The English elm is Ulmuscampestris; the common American or white elm is U. Americana; theslippery or red elm, U. fulva. Elm beetle (Zoöl.), one of severalspecies of beetles (esp. Galeruca calmariensis), which feed on theleaves of the elm.-- Elm borer (Zoöl.), one of several species of beetles of which thelarvæ bore into the wood or under the bark of the elm (esp. Saperdatridentata).-- Elm butterfly (Zoöl.), one of several species of butterflies,which, in the caterpillar state, feed on the leaves of the elm (esp.Vanessa antiopa and Grapta comma). See Comma butterfly, under Comma.-- Elm moth (Zoöl.), one of numerous species of moths of which thelarvæ destroy the leaves of the elm (esp. Eugonia subsignaria, calledelm spanworm).-- Elm sawfly (Zoöl.), a large sawfly (Cimbex Americana). The larva,which is white with a black dorsal stripe, feeds on the leaves of theelm.
it's an internet term like [rofl]. Used as an insult. It stands for:
A term that is used to describe something that is not functioning.