"Quit whining, dude!"

MANUP

Think of a slangy command that combines "man" with a word meaning to toughen up or take responsibility.

This clue plays on the phrase "man up," a casual (though sometimes criticized) way to tell someone to stop complaining and act tougher. The exclamation "Quit whining, dude!" mirrors that idea, pushing the solver toward the slangy command. The answer drops the space to fit crossword style, turning "man up" into "MANUP." It’s a bit old-school in tone but fits the clue’s blunt, dismissive vibe.