If you want to make the Meta itself bigger (i.e., add another hyper to the Meta) you have to break the meta, add the extra hyper(s) and rebuild the meta. If you just want to add another Meta to the device group/volume group you will need a volume manager (i.e., Veritas volume manager). By your question it sounds like you want to make the Meta bigger, which cannot be done online as it has to be unmapped from the FA to add the new hyper(s).
An infinite number of monkey typing at an infinite number of keyboards will eventually populate the internet.