"Careful!"

• Marching cadence start
• "Give me the ball"
• "___, two, three, four!" (marching syllables)
• "___, two, three, four..."
• Drill sergeant's bark
• One, to a drill sergeant
• Drillmaster's syllable
• Drill sergeant's call

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
hep \hep\ (h[e^]p), interj. A call used by drill instructors to count cadence during marching; used identically to hut and hup .

Wikipedia Word definitions in Wikipedia
Hup is the second album by The Wonder Stuff . The Hup album contains several references to the 1980s BBC sit-com The Young Ones . "30 Years In The Bathroom" features the line: 'Now it's time to share the joke that the latch on the bathroom door was broke.' ...