Job 15:26 New English Translation

²⁶defiantly charging against him^[a]
with a thick, strong shield!^[b]

Job 15:26 tn Heb “he runs against [or upon] him with the neck.” The RSV takes this to mean “with a stiff neck.” Several commentators, influenced by the LXX’s “insolently,” have attempted to harmonize with some idiom for neck (“outstretched neck,” for example). Others have made more extensive changes. Pope and Anderson follow Tur-Sinai in accepting “with full battle armor.” But the main idea seems to be that of a headlong assault on God.
Job 15:26 tn Heb “with the thickness of the bosses of his shield.” The bosses are the convex sides of the bucklers, turned against the foe. This is a defiant attack on God.

New English Translation (NET)