Quick answer: imposter syndrome (informal conversational) — Persistent internal doubt that one’s achievements are undeserved and that colleagues will eventually expose one as a fraud. Meanwhile, locked in (Focused · motivational) — Fully focused and committed to a task. “Time to lock in” means it is time to stop distractions and concentrate.
1. imposter syndrome ↗
Category: Work & online life
Register: informal conversational
Regions: US, UK, IE, Online
Persistent internal doubt that one’s achievements are undeserved and that colleagues will eventually expose one as a fraud.
When it fits: Use “imposter syndrome” in casual conversation, messaging, or sociolinguistic discussion when the listener shares the register and context makes the tone unmistakable.
When to avoid: Avoid relying on “imposter syndrome” in formal academic, legal, clinical, or HR correspondence where unambiguous plain English prevents misinterpretation.
“Everyone in the group chat recognized “imposter syndrome” immediately, even though we had to rephrase it in plain English for the project summary.”
In plain English: Everyone in the chat understood the informal expression (persistent internal doubt that one’s achievements are undeserved and that colleagues will eventually expose one as a fraud.), though we used standard wording in the formal report.
2. locked in ↗
Category: Internet essentials
Register: Focused · motivational
Regions: Online
Fully focused and committed to a task. “Time to lock in” means it is time to stop distractions and concentrate.
When it fits: Use it to announce focused effort or encourage a familiar teammate. A concrete task makes it more useful than a vague demand to try harder.
When to avoid: Avoid confusing motivational slang with locked-in syndrome, a specific medical term, or interpreting a confirmed price as a statement about concentration.
“Phone away, notes open. I am locked in until lunch.”
In plain English: I am concentrating and avoiding distractions.
Test both expressions in context
Quiz yourself on imposter syndrome & locked in ↗ Browse all slang comparisons →