noun
shrapnel
SHRAP-nul/ˈʃræpnəl/
Fragments scattered by an explosion.
Shrapnel flies outward from the exploding shell.

Etymology
Shrapnel’s name first denoted his shell, designed to burst and scatter its load of shot. The word was later applied loosely to the metal fragments scattered by exploding shells or bombs.
In context
I had shrapnel that's little bits of metal in my arm and in my face