What is Chumbum?
1.
Someone who you think is great and who thinks you're great too. Comes from the word
Chumbums are people you bum (in the context as above) and who bum you!!
Person 1:"Hey Chumbum"
Person 2:"Haha! Hey what you been up to?"
Person 1:"Nothing much!"
Person 2:"Wanna come over my house"
Person 1:"Sure"
Person 3:"You two stop bumming eachother!!"
See