knowing one's stuff
Expert in field
Knowing one's stuff means having thorough knowledge or skill in a particular area.
Someone who knows their stuff is competent and well-informed: Ask Jennifer about tax law—she really knows her stuff.
The phrase implies practical expertise rather than theoretical knowledge, the kind that holds up under scrutiny.
- credibilityQuality inspiring trust
- proficiencySkilled performance level
- problem-solvingAddressing challenges methodically
- competenceAdequate ability to function
- eruditionExtensive scholarly knowledge
mastery · hands-on experience · in the trenches · chops · been around the block · authority · resourcefulness · expertise · subject matter expert · specialization · seasoned · reputation · aptitude · skillfulness · certification · adaptability · acumen · sharp as a tack
knowing one's stuffincompetent
Lacking necessary skill
clueless · ignorant · inept · unskilled · out of one's depth
knowing one's stufffaking it
Performing authenticity without possessing it
bluffing · winging it · bullshitting · pretending · posturing
knowing one's stuffgreen
Color of vegetation
wet behind the ears · inexperienced · raw · untrained · unprepared
know, knowing, knows, known, knowledge, knowledgeable, unknowing, unknowingly, ones