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1. jst
Slang term for just
I jst gotta do sumin..
by jbx Mar 10, 2005 add a video
2. JST
Just So Titanic or JST, referring to an event, person or activity that is sad or deeply emotional.
"Its JST that your dog died last week, isn't it?"

"Yeah it is."
3. jst
"Jewish Standard Time"
Like CPT for Jews
1-We missed our dinner reservation because my friend was on JST and rolled in 20 minutes late
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