To vigorously finger a woman's vagina. Possibley using one/more/all fingers.
Bob: goddamn your hand stinks
Jeff: yea I was hand jamming your mothers rotten vagina last night.
by ZakZakzak October 19, 2012
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To exert unnecessary effort, causing undo stress or possible nerve damage to the hand in order to perform a task manually, instead of using readily available sources of technology or mental telepathy.

Anything that is written on paper which causes undo exertion of wrist and hand muscles by using a pen or pencil, as opposed to being typed into an electronic form or dictated to an assistant to then be typed into an electronic form.
Tony was unable to call Larry, because he could not read the phone number that Larry hand jammed on a piece of paper.

Tracey sprained her wrist from hand jamming addresses on Christmas cards instead of printing out labels.
by Kellierae February 10, 2011
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The stroking of ones genitals using your hands; masturbating; flogging the dolphin; choking the chicken; jaggin off; sweeping the chimmney;
Hey man, what did you do last night? Oh, not too much.. Just stayed up all night hand jamming...
by Hand Jammer May 25, 2010
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larry: shiiiit, two hand jam?
johnlarry: dont you mean bball?
larry: yup.
by funkmasterflex124 October 31, 2009
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1.A medical condition striking children that causes there hands to attract sticky substances and then deposit on just about everything.
2. The actual hands covered in the sticky substance
That bastard little kid got his damn jam hands on my cd.
by John Y December 7, 2003
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A condition where your hands become really sticky, as if someone smeared jam on them like your hands were a piece of toast, and you need to get germ-x to get rid of it
Kelly(searching through her stuff)- WHERE'S MY GERM-X?! My jam hands are so bad right now!
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When you eat a PB&J and get sticky-ass fingers. Jam hands!
"Bruh luv me some PBJ but these jam hands"
by imryanreid December 13, 2016
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