Step up: a command that is uttered at a nigga who is either trying to get in your face or is talkin trash about you like he is the shit when you know that deep down, the nigga is a soft-ass bitch.

Latrell: "Man, that Doug is a biscuit eatin' bitch."

Doug: "Oh so you have somethin' to say? why don't you step up you candy-ass trick."

by Big Snigger July 31, 2006
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 4, 2013
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
Get with the times, put more work and hours into what you're doing, the person saying this phrase works hard and is able to show off
Man 1: Hey man, check this out. I got 59 hours on Overwatch and I got 17 kills on one match!
Man 2: Really nibba you serious? I got 460 hours and I get 35 on a match, step up man!
by stinkyboi101 February 17, 2018
Used to describe a needed increase
"Alex is really stepping up her game."
"Step up and be a man."
by JWeezy January 18, 2006
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 5, 2016