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suit up

B1 informal inseparable intransitive
In simple words

To put on your uniform, costume, or work clothes and get ready to do something.

Literal meaning: To put on a suit (clothing).

Meanings

1 B1 informal

To put on a business suit or formal attire, typically before an important meeting or professional event.

"We need to suit up before the client presentation — first impressions matter."

"Suit up!"

— Barney Stinson (Neil Patrick Harris), 'How I Met Your Mother', CBS, 2005–2014 (recurring catchphrase)
Grammar: inseparable
2 B1 neutral

To put on a specialized functional suit or protective gear before a dangerous or technical activity, such as diving, astronaut training, or firefighting.

"The astronauts spent two hours suiting up before the spacewalk."

Grammar: inseparable
3 B1 informal

To put on a sports uniform or kit before a game or practice.

"The team suited up in the locker room and headed onto the field."

Grammar: inseparable
4 B2 idiomatic informal

(Figurative) To prepare yourself mentally and practically for a difficult task or challenge.

"It's going to be a tough negotiation, but we're going to suit up and get it done."

Grammar: inseparable
Usage notes

Used in both literal senses (putting on a business suit, sports uniform, spacesuit, diving suit, etc.) and figurative senses (getting ready for a challenge). Popularized in casual American English and in the TV show 'How I Met Your Mother' through the character Barney Stinson's catchphrase.

Commonly used with

game mission work interview dive battle

Forms

Base
suit up
I/you/we/they
3rd person
suits up
he/she/it
Past simple
suited up
yesterday
Past participle
suited up
have + pp
-ing form
suiting up
continuous

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