Netsteem is derived from the internet and esteem. As an idiom it means a low self esteem and personality crises of jeopardy. There thousands of Facebook users who keep changing their profile photos, posting selfies and also writing trivia like: ‘I am checking into this airport and that: blah blah blah’.
Example: Netsteem is poor self esteem.
Netsteem people are internally schizoid, cultural mavericks who indulge egotistical personality projection.