That coffee is 110 proof.
110 proof
idiomStronger than strong.
Origin
disputed originSee proof. Most hard liquor sold at retail in the United States is between 80 and 95 proof (40 to 47.5% by volume); higher proof alcohol is usually bootlegged.
The new manager is 110 proof when it comes to enforcing the company rules.
His commitment to the cause was 110 proof, leaving no room for doubt or hesitation among his followers.