Used in the masterpiece created by Lil nas X, Billy Ray Cyrus, Young Thug, and Mason Ramsey. In such context, ‘Giddyup’ is used as a trait or quality one possesses. If one has got giddyup then they can naruto run and they ain’t no Karen holding up the line.
When a man is doing a girl doggie style, and she's being to quiet. To get the girl to be louder, the man removes his condom and slaps er ass, back, cheeks, etc.
She was barely moaning, so used the condom to get her to Giddy-Up. She was back in moaning order pretty quick!