The person normally has no skills with electronic devices at all but uses his/her money to buy expensive gadgets to boast his/her ego and acceptance in a group.
"Hey guys, look at what my cool samsung galaxy S2 can do! Woohoo, and look what happens if you turn it upside down!"
The other party attendants pays him little attention, continues to drinks beer and sighs. "Can you believe that guy? Such an appmaster!"