Someone who 'jams' up a gaydar. Someone who gays but is straight. Or someone who acts straight but is gay.
Guy one: Ugh, I can't tell if that hottie is gay or straight.
Guy Two: I know, he shops at American Eagle but he listens to Abba
Guy one: What a total jammer!
by Helena Handbasket August 8, 2003
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Girl is a jammer. She sucked 37 dicks!
by Xerobull November 29, 2002
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A jammer is any given situation, object, person or item that is positive or that makes a situation better. The route of the word jammer comes from the slang term for a spliff.
- Alex came home to find out Max had bought him a Dominos. - Jammer

- Someone roll a Jammer (spliff).

- I could wear shorts today... - Jammer

- Max went to the shops to buy backy but when he got there Raj asked him for ID, which Max had previously lost (not a jammer). Then Alex, wearing his favourite techno shirt and vinyl satchel came into the scene, announcing that they had just received a noise complaint for playing too much good haus music late at night. All seemed lost until they returned to their apartment to find a weighed Q baked perfectly into some delicious brownies. The day was saved, by Meelan. - Jammer
by Abyss Recordings May 13, 2015
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A fun-loving, bald, Jamaican male who appreciates cars more than women.
That Emile sure loves motocross - he's such a funky Jammer!
by SeanWegmann October 7, 2007
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(radio)

a radio transmitter which is designed or modified to send a signal which deliberately inferes with another radio signal. (see also FRS jammer)

Jammers are most widly used by thegovernment and military in order to make it harder for the enemy to use their radio systems.

Also fun when directed at a rap radio station.
Dude! I jammed the rap radio station with the Spongebob theme song for 36 hours!
by IrishRepublicanArmy November 13, 2003
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