: one who is disapproved of or is held in contempt
: to give information about another's wrongdoing to an authority : squeal
" … A bunch of us had busted somebody's beautiful etched glass window with a brick. The cops came, rounded us up, and we all denied it except one guy who finked. … "—Dick Cavett
—usually used with on
He finked on them (to the police/teacher).
"Tell on you?" Ken said. "What makes you think we'd do a thing like that?" "Of course not," Toby said. "We don't go around finking on people."—Zilpha Keatley Snyder
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