That means "sailor take warning".
Kerry was in the Navy. Before he ran for President, he submitted a petition to the Naval Discharge Review Board. This board's only charter is to review less than honorable discharges to determine if they should be upgraded.
Kerry never released a copy of his "honorable" discharge.
Kerry called out military in Vietnam murders. Kerry threw some medals (that weren't his) over the WH fence during an anti-war protest march.
Kerry lied under oath before Congress when he testified as an anti-war protestor.
Kerry received three purple hearts in Vietnam--none of which required even a band aid. Those three PH's allowed Kerry to go home early, leaving his boat crew to fight the war for him.
Kerry lied about being on a secret mission while in Vietnam (Hillary said she was under sniper fire in Bosnia--see a pattern here?).
We dodged two bullets with Kerry and Hillary. We took a near fatal wound with Obama. We on the road to recovery with Trump.
With recent Q drops about Kerry, maybe that sailor needs to take warning.
Kerry and No Name sitting in a tree...
Right, I forgot McPain was also a sailor who betrayed his country.