suit up

1. To get changed from one's present attire into a suit

- To grow some balls, as it pertains to the pursuit of women. The act of "suiting up" is a realization of values that make a man attractive to a woman, and a rejection of the values of a man that are idealized in women, but provide no success pragmatically in attraction. This includes rejecting notions of being nice, seeking to be liked for whom you are, and treating a woman well etc. Hence, "suiting up" is a moment of growth and acceptance of such things necessary to attraction as playing hard to get, being rich, being cocky, having good hygiene, and dressing well. This phrase is derived from the physical action of putting on a suit or "suiting up" in order to impress the ladies.

slang for putting on a condom before sex.

1.,To posses, or hold, a large quantity of an item/s, (such as money or drugs)

Not meant to be taken literally in the terms of being dressed in a suit.

Suit-Up is from SHINee Jonghyun's 1st album 'She is'.

'Oh suit up
Tightly tied Bow tie
Shining cuffs put it all away
Don’t need them here
Oh dress up (softly)
The white veil that covers you
The soft lace, take it off
Don’t need to hide anymore

Suit up simply means 'grow a pair and let's go'. Throwing a suit on doesn't hurt either.

Getting dressed, wearing a certain get up, having on a outfit etc. Usually when you use 'suited up' it means it's something special or nice about your appearance, or sometimes it can be used in a sarcastic way or to add emphasis on detail about what you have on or are wearing.