v. the act of conversing and spending time with friends and/or acquaintances with no real purpose other than to bask in their presence; ideally, rum is consumed, however is not necessary
Daniel: What do you want to do now until the movie starts?
Cynthia: Let's go rumchum with our pals.
Daniel: I'll bring the rum!
When finance content creators rent out fancy cars and flexcash to seem richer than they really are in order to promote and sell their “get rich quick” courses.