The Solecism Mixtape (Side A) Solecism - 1.Something deviating from the proper, normal, or accepted order. 2. A breach of etiquette or decorum. 3. Behaviour that is a social mistake or is not polite. 4. Any error, impropriety, or inconsistency. 5. A deviation from the norm, something illogical, incongruous, absurd, or even an impropriety.