Tweaking means acting irrationally or overreacting — or, in its original sense, being under the influence of stimulants.
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Slang. Also written tweakin, tweak.
Originally drug vocabulary describing the agitated state of a methamphetamine user. The slang sense generalised the behaviour rather than the cause, and now usually just means someone is being unreasonable.
The common use is an accusation of overreaction — "you are tweaking" means you are being irrational about something minor. Most people using it now have no awareness of the drug origin. It is also occasionally used literally in contexts where that meaning is obvious, which is exactly the ambiguity that makes it awkward for a brand.
The drug origin has not gone away even though most speakers are unaware of it. Applied to a person it is also an accusation of irrationality, which is not something a brand should be levelling.
Acting irrationally or overreacting. Telling someone they are tweaking means you think they are making too much of something.
Originally yes — it described the agitated behaviour of a stimulant user. The slang sense borrowed the behaviour and dropped the cause, and most current users are unaware of the origin.
Mildly. It accuses someone of being unreasonable, which lands as dismissive even when said jokingly.
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