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1.
psa
Publice Service Announcement. Rarely used as an acronym.
This following snow warning is a public service announcement.
by Naugahyde March 06, 2004
 
2.
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.
by Dr. Rosebud July 02, 2005
 
3.
PSA
Profound and Sincere Apologies
For use in emails, "I completely messed up PSA"
by Emmsb January 12, 2011
 
4.
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!"
by uva185 May 04, 2006
 
5.
psa
Personal sale assisant
This PSA told me I should upgrade my computer instead of buying a new one.
by Alexandre22 November 17, 2007
 
6.
psa
penis still attached.
Don: omg she's hot.
Ted: I don't think your ready for her.
Don: why not?
Ted: she's got the psa...
by MLH2o January 25, 2011
 
7.
Penis Sucking Association
Penis Sucking Association( P.S.A.) has now opened it's door for more gay members. I (slicer)along with my bf Patton lead this gay group.
by Slicer PSA June 26, 2012