Mahoosive Meme

A week or two ago my daughter started using the word "mahoosive" to mean "very big", "huge" or "massive".  She  seems to have caught this from her school friends.  A quick search on Google reveals the following variant spellings:

• Mahoosive - 19,700 hits
• Mahusive - 5,620 hits
• Mahousive - 1,300 hits

I presume that this first appeared as an embellishment of "massive".  The earliest appearance in Google Groups is in a post from 1999, so it is not an entirely new coinage.  I suppose it could have been around a lot longer.