'Doing up' means to to something to its full extent. Normally something one wouldn't regularly do.
Example being, a person is baby-sitting their niece/ nephew and but is asked to come out with friends:

Person 1: Yooo come through this party tonight man'

Person 2: Ahh I can't man, I'm doing up uncle duties and shitt
by Kerra1995 June 6, 2018
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1. Attire
2. A person's outfit
3. Clothing, apparel
4. Cool clothes
Denise's "do-up" turned heads at the throw-down: black silk spray-on dress, no undies or bra. Oooooo-oo!
by William Dean A. Garner September 20, 2003
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ay Gurl you tryna do up?

yo man this gurl last night was tryna do me up low key.

yo these gurls tryna run a train and do up.
by DAKHANFLICT July 15, 2011
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1. inject a drug, especially heroin
2. to kill someone
3. going over
by VAKI5 August 20, 2003
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When a person consistently says false facts and rubbish combined in a sentence
Richard: The apple is red and apples are found on


Kevin: Nah apples are violet and I like to eat them on Mars *kevins moist laugh*** i am just doing up kev
by Kunlerichardkevinderrickdaniel November 29, 2020
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