Mycgern

According to the Old English Dictionary:

mycgern

fat about the kidneys :-- Micgern exugium, Wrt. Voc. i. 46, 10: exugia, ii. 30, 13. Micgerne exugia i. minctura, 146, 31. Rysele, mycgern axungia; micgern arvina, i. adeps l UNCERTAIN pinguedo. Hpt. Gl. 471, 4-7. [Leo suggests borrowing from Welsh mychiryn lard.] mycgern