slack-jawed

Our squadron doctor was lean, well muscled, square jawed and blond.
I Shot Bin Laden|Elliot Ackerman|November 16, 2014|DAILY BEAST
He knew I was a Chicago guy, and he cut me absolutely no slack.
Bill Murray’s Words of Wisdom: On Comedy, the Greatness of In-N-Out, and Searching For Great Love|Marlow Stern|October 10, 2014|DAILY BEAST
To the contrary: since the 2011 ouster of Gaddafi, the world has cut Libya a lot of slack.
It’s Not the USA that Made Libya the Disaster it is Today|Ann Marlowe|August 3, 2014|DAILY BEAST
Square-jawed and muscular—in snapshots he looks like Channing Tatum in camo—Gibbs seemed to fit the mold of the ideal soldier.
‘Kill Team’: The Documentary the Army Doesn’t Want You to See|Andrew Romano|July 26, 2014|DAILY BEAST

Still, a tight-jawed smile, wild eyes and a southern California drawl remind me of Matthew McConaughey.
He Bullies Kids and Calls It News|Brandy Zadrozny|June 26, 2014|DAILY BEAST
We—or rather Raglin and one or two others—jawed for an hour; but the wretches never yielded an inch.
Ancestors|Gertrude Atherton
I wonder if that square-jawed devil has got a glimpse of us and is trying a lone-handed stalk himself?
Raw Gold|Bertrand W. Sinclair
An amount of slack in the chain caused the balls to knock on passing this roller before entering the pump bottom.
Life of Richard Trevithick, Volume II (of 2)|Francis Trevithick
I went into the dugout indescribably slack; hardly energy to struggle against the heat and the myriads of flies.
Gallipoli Diary, Volume I|Ian Hamilton
Lost Sister had fashioned a rude litter out of rawhide and two saplings, slack between the poles so the girl could not roll out.
A Virginia Scout|Hugh Pendexter