fink on
phrasal verb
finked on; finking on; finks on
US, informal
: to tell someone about the bad behavior or criminal activity of (another person)
The other gang members will kill him if they find out that he finked on them (to the police).
Cite this Entry
“Fink on.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fink%20on. Accessed 29 Nov. 2025.
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