Half-assery

This job has to be done right. I won't tolerate any half-assery.

Source: wiktionary

Sharon groaned and went limp in her chair; presumably she'd heard all this before. ¶ "—same votes. Same trends. Same half-assery, and the same murders and rapes. Need I go on?"

Source: wiktionary

Robert Downey Jr.'s old buddy Shane Black, once a driving force behind clever and self-conscious '80s and '90s action movies, delivers on all the Marvel popcorn thrills—like the kinetic scene where Tony Stark saves a bunch of Air Force One passengers as they're plummeting to the ground—while indulging his own ideas about motormouthed heart-of-gold fuckups, old-school detective-novel plotting, heroic halfassery, and Christmas decorations. It's my favorite of the Iron Man movies.

Source: wiktionary

You're pushed to work at your max effort for the majority of the class, so you're going to sprint really hard and fatigue your muscles with seriously demanding weighted exercises. There will be none of the gratuitous breaks and half-assery you might do in your home workouts.

Source: wiktionary