"House jumping" - Working definition?

[Zach Chappell]

Hello,

My name is Zach Chappell, and I am a 27 year old from Madison, WI. I have casually invested in stocks and such since I graduated college in 2011, and am now ready to take the leap into real estate investment. I have enough saved for a healthy down payment. 

My question is with regard to the concept of "house jumping", which I have seen referenced from time to time. It is apparently a method of acquiring several multi-families with lower downpayment costs. 

Would anyone with experience in "house jumping" be able to give me a comprehensive rundown?

Thanks from a newbie,