Informal/slang: to be stimulated or under the influence of a stimulant drug such as methamphetamine; to be intensely focused or hyper due to a stimulant.
Be very hyped up or affected by a stimulant drug.
One main meaning — here's how to use it.
To be under the influence of a stimulant drug, especially methamphetamine, or to be in a hyperactive state caused by stimulants. (American slang)
"He was clearly tweaking on something when he came into the shop."
Primarily American drug slang. 'Tweak' in this context is associated with methamphetamine use. Can also mean to be obsessively focused on something. ESL learners should recognize this as drug-related slang.
Natural word combinations native speakers use most often.
The five tense forms you'll use most often.
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