What is Pbi?
1.
Personal Bubble Invasion
Someone who always gets inside your personal comfort zone when talking to you or stands a little too close when they walk up to you. Also known as Personal Space Intruder.
"Whoa, PBI! Could you back it up a bit, you're all up in my space."
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7.
(v.i.) Out to lunch; not having it together; acting in a stupid way. Typically derogatory.
Derivation: ..