Human mobility models strongly affect the performance in Mobile Ad Hoc Network (MANET). In order to get a more precise estimation of routing performance, it is crucial to construct a more realistic human mobility model. There are three properties investigated in literature which represent the patterns of human mobility. This paper analyzes real human traces and introduces a new property that the inter-hub movement of a human is not straight. We then construct a new random human mobility model called Irregular Orbit Levy-walk (IROL), and verify its ability to capture all of the four properties simultaneously. To investigate the feasibility of IROL, we measure routing performance of real traces, IROL, and other models in MANET on two data sets. In both data sets, IROL describes the real traces the best in terms of throughput and receive rate.