Home › Words › M › megilpmegilp/məˈɡɪlp/megilp means A mixture of linseed oil with turpentine or mastic varnish, used as a thickener for oil paints but later discredited as a source of cracking and yellowing.megilp is pronounced /məˈɡɪlp/.EtymologyUnknown.nounA mixture of linseed oil with turpentine or mastic varnish, used as a thickener for oil paints but later discredited as a source of cracking and yellowing.e.g.“He was in a hurry […] and instead of replicating the twenty or so layers of paint in the original he used megilp to give the impression of thickly applied paint.” — 2002, Victoria Finlay, Colour, Sceptre, published 2003, page 202:Definitions & examples from Wiktionary (CC BY-SA 3.0).