know one's stuff
English · Thesaurus
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know one's stuff
verb knows one's stuff · knowing one's stuff · knew one's stuff · known one's stuff
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To be knowledgeable about and competent at a particular subject or task.
Joe really knows his stuff when it comes to baseball.
Similar: know ball, know one's onions, know one's shit, know one's way around, know the drill, know the score, know which end is up
Opposite: know one's ass from a hole in the ground
Thesaurus
verb
Opposite: know one's ass from a hole in the ground
Translations
Every language
verb be generally experienced and knowledgeable
| Deutsch | auskennen, gut Bescheid wissen, Ahnung haben |
|---|
verb knowledgeable in a particular field
| Français | toucher sa bille |
|---|---|
| Deutsch | sich gut auskennen, gut Bescheid wissen |
| Italiano | sapere il fatto proprio |
Talk about this word "know one's stuff." Wiktionary, via Micwyn, micwyn.com/word/know%20one's%20stuff. Accessed 6 Nov. 2026. know one's stuff. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/know%20one's%20stuff "know one's stuff." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/know%20one's%20stuff.Cite this
@misc{know_one_s_stuff_2026,
title = {know one's stuff},
howpublished = {Wiktionary, via Micwyn},
year = {2026},
url = {https://micwyn.com/word/know%20one's%20stuff},
urldate = {2026-11-06}
}
