Nike it! 

When you tell someone to just go ahead and just do it, regardless of their objections.

She told me the word was misspelled, but that's how the client wanted it, so I told her to just "Nike it!"

Nike it! by Another Ad Guy January 9, 2014

nike it 

refers to nike's slogan just do it. when someone is being a pussy tell them to "nike it" meaning just do it

mike: dude i don't think i can do this...

tyler: come man, dont be a pussy! Nike it man!

nike it by squwirl April 26, 2010

Nike it up

Another way to say "just do it". Stems from NIKE's slogan "Just Do It". "It" is a pronoun in this case which can and will be switched out for a more specific object.

We told him to Nike it up after he told us how much homework that he was complaining about.

We told him to Nike his homework up after he was being a total B.A.D.D.

Yo, look at the b-rod
Yea, i wish i could Nike it up

Nike it up by Kepah November 10, 2008