un·cer·e·mo·ni·ous 
/ˌʌnˌserəˈmoʊnijəs/ adjective
/ˌʌnˌserəˈmoʊnijəs/ adjective : happening or done very suddenly and quickly with no effort to be careful or polite
▪ His unceremonious dismissal by the new boss surprised everybody.
▪ His unceremonious dismissal by the new boss surprised everybody.
— un·cer·e·mo·ni·ous·ly adverb
▪ The team unceremoniously dumped him at the end of the season.
▪ The team unceremoniously dumped him at the end of the season.
