fink out on someone/something

fink out on (someone or something)

slang To abandon someone or something. I can't believe you finked out on us at the last minute! They really need your help—don't fink out on them.
See also: fink, on, out

fink out (on someone/something)

in. to decide not to cooperate with someone or something (after all). Come on, don’t fink out on us now.
See also: fink, on, out, someone, something