"the bubble
guts" a
bad feeling in
the pit in your stomach, oftenly reffered to as "butterflys in your stomach"
the feeling you get when you get scared/paranoid about something
"come on man, this aint a good idea, i got the BG'
s"
"what the fuck is the BG'
s?"
"it means i got the bubble
guts"
"sounds like butterflies to me"