VSIP: Very Self-Important Person. Used to identify someone who is not a VIP (Very Important Person) but believes he/she is entitled to special treatment because he/she is obviously very special.

VIPs are important people. VSIPs are not.
At the party: “Here comes Theo. He’s a VSIP. If he comes over don’t be nervous, just kiss his ring and you’ll get along just fine.
by Nonsum Barnett September 8, 2018
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My girl is very important but also very slow so therefore she is a vsip.
by Steven Bunton June 17, 2021
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