Reading this has been so educational. I believe I have full understanding and definition of the term Jar Head.
THANKS I think. dou·ble en·ten·dre ˌdo͞obl änˈtändrə,ˌdəbl änˈtändrə/ noun noun: double entendre; plural noun: double entendres a word or phrase open to two interpretations, one of which is usually risqué or indecent.