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From what I've heard it means that your digestive system isn't all that efficient. I know that the average human being breaks wind approx 12 times a day but I think it's an indication of poor digestion/diet when they are frequently smelly, IYSWIM.
Apparently stretching like a cat helps release it - you know lean on elbows and poke bottom in air and stretch you back out - don't know why and can't rememebr where or why () I know that but it does work to a degree - you can get tablets too that absorb the wond and try not to take anything containing calium as they just makes it worse!!