to accept responsibility for an illegitimate child, usually one that you fathered
Girl: ... definitely pregnant... getting an ultrasound tomorrow.... one of these niggas gonna have to step up!
by Borx March 04, 2013
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a movie starring channing tatum.

also, has a kick ass theme song.
if you step up i'll step up too.

yo, lets watch step up. AUGUST 11!
by roxanne June 18, 2006
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Used to describe a needed increase
"Alex is really stepping up her game."
"Step up and be a man."
by JWeezy January 18, 2006
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A step up is someone in a group of people or friends who does all the awkward shit that's embarrassing just on there own. Making you or everyone else feel superior. Meaning that you are viewed as a step up higher than them popularity wise.
"Tim was being so werid tonight at the party, he really is such a step up. He did do so much werid and awkward things, I am pretty sure the whole group felt more popular than him on a higher level."
by unicorn girl 101 February 04, 2016
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