(Trans) [YULSTAGRAM] yulyulk: a piacere ma non troppo #ilikethat #My black pea boong boong ... http://t.co/c65EU0HvbK http://t.co/dT40jxVC19
Note: 깜콩 = (검)정색 pronounced as geom hence similar to ggam? + 콩 (pea/bean)
Boong boong is like the sound of a car, like a boong boong car in korea theme parks.
(Reminds me of taeyeon saying boong boong on RM -.-)
Guess it's the nickname given by Yul for her Z4 car?