a get together or party with family/relatives
THERE'S A FAM JAM TONIGHT! Grandma's gon be crashinnn it.
by narminder May 26, 2008
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1. to party with family

2. to miss going out going with friends because of stupid family events
guy 1: yooo did you did go to that party last night is was sick

guy 2: bro i was at a fam jam
by alexander pina and jlo July 11, 2008
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An orgy consisting of immediate family members.
Scotty,

We miss you. When you get back from the Marines me and your Father have a nice fam jam planned for you.
Your sisters said "Hey and they miss you."

Love,
Mom
by RANDYSANDYPANTIES February 7, 2011
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this is a family where kids pretend to have a family with other students. for example.....my fam jam is.......
auntie Roz, auntie Emma, Sara(me)
rozes kids are.... Taylin, Kurt, Brendan, Cole. rozes lover is Harry Collett

emmas kid is.... Alyssa. emmas lover is Kaden
saras kids are .... Allison, Jaxon, Gabe. saras lover is nobody because she divorced him last year.
the fam jam is messed up because roz fucks her nephew
the fam jam is messed up because these are kids pretending to have kids
the fam jam is messed up because rozes boyfriend is famous and doent know her
by that family life March 12, 2020
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