The phrase
"bulging bag" means a bag that is really full and looks like it might burst because there are too many things in it.
Full definition
You can't have too much inflight entertainment for young children: If you wonder why parents of young kids travel with five pieces of luggage, it's because three of those five
bulging bags are filled with toys, books, games and gadgets lest junior gets bored for more than a second and all hell breaks loose.
I felt
a bulging bag of water right inside, but the head was still a few inches up behind my cervix.
I got back on the bed to be checked and was found to be 8 cm with
a bulging bag and baby -1 station.
Jessica had checked herself and was about 4 cm with
a bulging bag of waters.