A term used to describe a pregnant woman who is emphasising her bump.
The emphasising could be any number of ways, the most common being to place the hands on the hips and push the belly/bump out whilst making facial gestures to support the bloranging.
Look at that woman over there, see, she bloranged and before long, someone saw her and gave up her seat so she could sit down on the train.
When being asked to go and get a drink by her husband, Rachel bloranged, groaned and smiled sweetly. Her husband then got up and made the drink himself.