The new team faced its first 'acid test' when it played the national champions.
Their pizza gives me 'acid indigestion'. [=a burning feeling in the stomach]
He washes his windows with an 'acid' solution of vinegar and water.
(..) with blood of man that, swift as quicksilver... ...it courses through the natural gates and alleys of the body, and with a sudden vigour... ...it doth posset and curd, like acid dropping into milk, the thin and wholesome blood So did it mine. And soon a foul eruption all my smooth body (..)2015 Hamlet