From the verb chimbiar: to annoy, to pester, to mess with someone, or to fuck around. (In Colombia, this is a common, informal way to describe someone being a nuisance).
I am going to shoot him if he keeps chimbiando. (Chumbimba is a slang term for killing or shooting someone).
To pester, bug, or meddle in someone else's business, particularly by interrupting conversations to be a nuisance or to nag. (This term is commonly used in the Dominican Republic as a milder, socially acceptable alternative to more vulgar words for bothering someone).
Two classmates are chatting excitedly at a friend's house when one of their mothers rudely enters the room and starts to Fuñir by reminding them of the chores they need to do.
An exclamation used to express frustration, annoyance, or impatience, especially when someone is being particularly irritating or won't stop bothering you. (It is a Dominican variation of the vulgar term coño).