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Definition
A keyword: an important word to learn stuff1   Show phonetics
noun [U] INFORMAL
1 used to refer to a substance or a group of things or ideas, etc without saying exactly what they are
There's some sticky stuff on the carpet.
They sell bread and cakes and stuff like that.
What sort of stuff are you interested in?
Can I leave my stuff at your house?

2 know your stuff
INFORMAL to know a lot about a subject, or to be very good at doing something
She's an excellent teacher - she really knows her stuff.

3 strut your stuff HUMOROUS INFORMAL
to dance

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