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!
And dying in yo' bed many years from now, would ya be willing ta trade all da days from dis here day ta dat fo' one chance, just one chance, ta come back here as young men an' tell our enemies dat dey may take our lives but dey will never take our freedom ... YUB NUB!