(one's) jam noun phrase informal slang
Used to describe one's favourite song.
Whenever I come to my friend’s cafe, I require the waiter to turn on my jam.
My younger brother kept turning up his jam while I was doing homework last night. This made me annoyed.
Something that a person loves or cares about.
I don't want to race the horse as it isn't my jam.
Playing the guitar is his jam, so I think I will give him a guitar on his birthday.
A humorous way of saying that what one has said is just what they acknowledge and may not be entirely accurate
Mike: Have you returned from your vacation on the beach? Your skin seems to get tanned.
Jenny: My skin is always dark. That's my story and I'm sticking to it!