JMT

Abbreviated form of 존맛탱 — when food is so good you don't even need full words. 탱 originally traces back to Taeyeon's fan nickname 탱구, but now survives purely as a cute emphasis sound with no literal meaning.

J = 존 (intensifier — shortened from '존'나)

M = 맛 (taste/flavor)

T = 탱 (cute emphasis sound — originally from Taeyeon's fan nickname '탱'구)

See also: 존맛, 존맛탱, 존맛탱구리, JMT, JMTGR