Similar words: sum up, drum up, to sum up, humus, chum, chump, chummy, machu picchu. Meaning: v. become friends; act friendly towards.
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1. They chummed up in a short time.
2. She chummed up with some girls from Bristol on holiday.
3. She's chummed up with the girl in the next room.
4. George wondered whether he would enjoy a holiday in a small mountain village;but he soon chummed up with the villagers' sons and they all had a wonderful time.
5. His little brother has chummed up with some badly-behaved children.
6. It's good to see your children chumming up with mine so well.
7. Kenny tried to chum up with his new roommate but was only partially successful.
8. I notice it did not take Julian long to chum up with the new secretary.
More similar words: sum up, drum up, to sum up, humus, chum, chump, chummy, machu picchu, firm up, warm up, warm-up, clam up, team up, dream up, bottom up, tumult, cumulus, tumulus, plumule, cumulate, cumulative, accumulate, tumultuous, altocumulus, accumulator, accumulated, accumulating, tumultuously, cumulatively, cumulonimbus.