Jammer may refer to:
Signal blocking devices Radar jammer, a device used in radar jamming and deception Radio jammer, a device used in radio jamming Radio-controlled Improvised Explosive Device jammer, a counter-IED device Mobile phone jammer, an instrument used to prevent cellular phones from receiving signals from base stations
Sports Jammer (American football), a special teams position Jammer (mascot), mascot of the Northern League Joliet Jackhammers Jammer (swimwear), a type of male competitive swimwear Jammer, the scoring position in roller derby Jamestown Jammers, a minor league baseball team
People Jammer (rapper) (born 1982), English rapper and producer Daniel Jammer (born 1966), Jewish German-Israeli businessman and entrepreneur Max Jammer (1915–2010), Israeli physicist and Rector and Acting President of Bar-Ilan University Quentin Jammer (born 1979), American retired National Football League player
Entertainment The Jammers, American electronic music studio group Jammers, a term used for players of Animal Jam Classic Jammers, a group of characters in the TV series The Prisoner who use misdirection to confuse onlookers with misinformation
See also Red Jammers, buses used to shuttle guests around Glacier National Park Jamming (disambiguation)