JMTGR

An even stronger version of JMT (존맛탱) — when food is so good that regular JMT isn't enough. From 존맛탱구리, a more exaggerated form of 존맛탱.

Both 탱 and 구리 trace back to 탱구리, a nickname fans gave to SNSD's Taeyeon — later shortened to 탱구, then made cuter as 탱구리. Over time, 탱 survived in 존맛탱 and 구리 survived in 존맛탱구리 — both now serving as pure cute emphasis with no literal meaning.

J = 존 (intensifier — from 존나)

M = 맛 (taste/flavor)

TGR = 탱구리 (cute emphasis — originally from Taeyeon's nickname 탱구리)