psa 

mostly ‘psa’ mean ‘public service announcement’ but recently i’ve found that it is also another way to say ‘personal self advice’.
psa is an acronym and very useful on the online media.
if you use any of these in the same sentence it will most likely still make sense.

PSA: don’t drunk drive or else there will be major consequences.

psa by jirra January 7, 2019

psa 

Publice Service Announcement. Rarely used as an acronym.

This following snow warning is a public service announcement.

psa by Naugahyde March 6, 2004

PSA 

Public Service Announcement

PSA that is my man so back off

PSA by imdxddy2 May 30, 2018

psa 

public service announcement ( mostly used on social media)

psa ~all y’all btchs ugly

psa by kaiiibug May 19, 2019

psa 

A protein made specifically by the prostate gland -- Prostate Specific Antigen. It is measured by a blood test, and is used for screening for prostate cancer and checking for the results of treating that disease.

James saw his doctor today, since he was upset that his PSA was over ten thousand (normal is up to four). Then he went to make final arrrangements.

psa by Dr. Rosebud August 6, 2005

PSA 

Pacific Southwest Airlines headquartered in San Diego, California. Featured Smileliners (Airplanes with smiles painted on the nose). Purchased by USAir in 1987

"PSA, Catch our smile!"

PSA by uva185 May 15, 2006

PSA 

Profound and Sincere Apologies

For use in emails, "I completely messed up PSA"

PSA by Emmsb January 13, 2011