Final answer:
Tardive dyskinesia is the common side effect of neuroleptics that causes involuntary movements of the tongue, mouth, or jaw.
Step-by-step explanation:
The common side effect of neuroleptics that consists of involuntary movements of the tongue, mouth, or jaw is Tardive dyskinesia. Tardive dyskinesia is a neurological disorder characterized by repetitive and involuntary movements of the face, lips, tongue, and jaw. It is a well-known side effect of long-term use of neuroleptic medications such as haloperidol.