(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.
1. Soneone tends to speak in unkind and cruel way that is likely to upset or hurt someone else.
2. The fossil tooth of a shark
1. Many people doesn't want to make friends with Sue because she has a serpent's tongue.
2. A: 'My thesis will center on a serpent's tongue.' B: 'A serpent's tongue? What does it mean?' A: 'A serpent's tongue means the fossil tooth of a shark.'