In British English, pants means “underwear”. In London, asking for “pants” might get you underwear! It’s a bit different there. When in doubt, go with “trousers” in the UK.
Examples
Those are my pants.
I ripped my trousers.
Pants and trousers sound different too:
Pants
Trousers
Other examples with pants and trousers
She wore pajama pants.
My pants were soaked.
I need new pants.
He ironed his trousers.
Derek unbuttoned his trousers.
Mary likes wearing trousers.
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