Correct spelling for the English word "megylp" is [mˈɛd͡ʒɪlp], [mˈɛdʒɪlp], [m_ˈɛ_dʒ_ɪ_l_p] (IPA phonetic alphabet).
A compound of linseed-oil and mastic varnish, &c., used by artists as a vehicle for their colours.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.