BGST
Short for Bagus, Sopan, dan Terpelajar (Good, Polite, and Educated) in Indonesian
Person A: "Hey man you're so BGST"
Person B: "Thanks man"
Person B: "Thanks man"
BGST
Bloody Good Seeing-To (acronym and euphemism).
"My b/f came over on Friday night and gave me a BGST. Saturday I could hardly walk."