존맛탱구리

The full, drawn-out version of 존맛탱 — same meaning, just more energy. From 존나 (intensifier) + 맛 (taste) + 탱구리, where 탱구리 traces back to 탱구, a nickname given to SNSD's Taeyeon by fans, later made cuter as 탱구리. Both 탱 and 구리 now survive purely as cute emphasis sounds with no literal meaning.

존 = vulgar intensifier (shortened from '존'나)

맛 = taste, flavor (맛)

탱구리 = cute emphasis sound (originally from Taeyeon's fan nickname 탱구리)