tweak

Definitions

• (transitive) To pinch and pull with a sudden jerk and twist; to twitch.
• (transitive) To adjust slightly; to fine-tune.
• (transitive) To twit or tease.
• (intransitive) To abuse methamphetamines, especially crystal meth.
• (intransitive) To exhibit symptoms of methamphetamine abuse, such as extreme nervousness, compulsiveness, erratic motion, excitability; possibly a blend of twitch and freak.
• (intransitive) To exhibit extreme nervousness, evasiveness when confronted by law enforcement or other authority (e.g., customs agents, border patrol, teacher, etc.), mimicking methamphetamine abuse symptoms.