a minced oath (pseudo profanity or expletive deletive) in the fashion of altering traditionally obscene, blasphemous or words or phrases otherwise unacceptable for public use and discourse--jeez louise for jesus christ or freaking for f*cking. mammer jammer is a replacement for mother f*cker. Used in blaxplotation films and made popular by the stevie wonder song of the same title.
Philadelphia tradition: grown men dress like women and bums get wacked on drugs and booze, play banjos, tubas, and flutes while running through the streets causing mayhem. The mummers are divided by brigades, fancies, comics, gays, trannies, post and pre op transexuals. Mummers are known to take a full year to make thier costumes. Women are prohibited from becoming mummers. Sexual relations between the mummer men is commenplace as there judgement is often so impaired during the parade. Most mummers are Eagle fans.
I watched twodrunken mummers blow each other on new years day!