According to Osho, calling someone a bigmouth is a humorous jab at a compulsive talker and braggart—exaggerated into a literal ‘huge mouth’ that could have hidden the suitcases. The joke points beyond insult: keep a light, detached heart in adversity, laugh at loss, and see how egoic chatter (the real big mouth) matters less than awareness and ease.
He’s joking that a ‘bigmouth’ talks so much it’s like their mouth could hide suitcases—reminding us to laugh and not cling to stuff.