What is another word for chum up?
Pronunciation: [t͡ʃˈʌm ˈʌp] (IPA) 
Chum up is a colloquial term that means to develop a friendly relationship with someone. The term can be replaced by many synonyms, such as buddy up, pal up, hang out with, mix it up with, hobnob with, and rub shoulders with.
Buddy up suggests a close friendship, while a slang term like bro down gives a sense of a casual and relaxed relationship. Meanwhile, pal up may indicate someone is friendly with another person to achieve a goal, like networking or social climbing. In contrast, to hobnob with or rub shoulders with implies socializing with someone of a higher social status.
Overall, chumming up is a way to build solid connections and friendships in a personal or professional setting. The choice of synonymous terminology would depend on the context and desired effect of the relationship.
