Freddie’s an old school chum of mine.chumchum /tʃʌm/ noun 
Freddie’s an old school chum of mine.2[uncountable] small pieces of oily fish, used to catch other fish
WORD ORIGINchum
Origin:
1 1600-1700 Probably from chamber-fellow ‘someone sharing a room’2 1800-1900 Origin unknownEXAMPLES FROM OTHER DICTIONARIES
- I ran into an old high school chum.
- Her school chums may disagree with her politics but they treat her respectfully and make sure their colleagues do, too.
- I hardly knew Kapinsky, in fact I avoided him and his chums.
- I think it helps if you have a chum out there.
- It was during this time that James was able to reacquaint himself with another old school chum, Malcolm Nurse.
- Pesci and Glover are longtime chums who win a fishing vacation in Florida.
- We must also avoid branch meetings seem like a gathering of old chums into which an outsider might be shy of intruding.
COLLOCATIONS FROM THE ENTRY Freddie’s an old school chum of mine.COLLOCATIONS FROM THE CORPUSADJECTIVE
1[countable] informal old-fashioned a good friend: Freddie’s an old school chum of mine.· We must also avoid branch meetings seem like a gathering of old chums into which an outsider might be shy of intruding.· He built a political alliance with his old college chum and fellow L. A. Democrat, Rep.· Her old chum, her very best friend.· The twins, who had only left the Pony Club two years ago, pushed off to see their old chums.· No offence meant, honest, old chum.· He was just Margaret's old chum who had loaned me a shoulder and was still metaphorically holding my hand.· The first thing I see is that my old chum has been taken apart and badly reassembled.
NOUN· Her school chums may disagree with her politics but they treat her respectfully and make sure their colleagues do, too.· From grade school chums in suburban Chicago to motel managers in Sacramento, folks remember him.
Freddie’s an old school chum of mine.2[uncountable] small pieces of oily fish, used to catch other fish