When someone is extremely happy and sees everything positive and is smiling all the time. Coming from the Prozac medication (fluoxetine) for depressive people.
Jane: "So I had to block Lisa from my FB wall cuz she kept commenting about her mess and I'm sick of it."
Joan: "Unfriend! Dislike! Block!"
Jane: "Prozactly"
or
Him: "So is that, like, how your mom normally acts when she's with a large group of strangers?"
Her: "Prozactly"
The doctrine within medical practitioner circles of over prescribing the drug Prozac as an easy cure-for-all alternative to traditional more time-consuming and expensive methods of psychiatry. This practice is of benefit to the Healthcare profession but compromises the patient.
An anti-depression medication. Fairly effective in treating depression, but it has some bitchin' side effects. Seizures, suicide, excessive sweating, etc.