~呼ばわりする (label/call pejoratively)

The suffix ~呼ばわり attached to a noun (often a derogatory label) plus する, meaning 'to label someone as X' — almost always with negative or unfair connotation. Common pairings: 馬鹿呼ばわり, 嘘つき呼ばわり, 犯人呼ばわり.