15 certificate in the UK for
"very strong language, strong sex, bloody violence, drug use".http://www.bbfc.co.uk/releases/certain-justice-2014LANGUAGE
There is one use of very strong language ('c**t') and several uses of strong language ('f**k' and 'motherf**ker').
SEX
There is an impression of oral sex being performed on a man by a woman, and sight of two semi-naked women kissing and writhing together.
VIOLENCE
There is sight of blood sprays when characters are shot, and sight of blood when characters are stabbed. There is also some sight of bloody wounds. In one scene, it is suggested that a woman is being raped, but without strong detail.
DRUGS
Sight of cocaine snorting.
This film also includes several racial slurs, used by the bad guys in reference to the hero's East Asian heritage.
Not 18 huh? The BBFC got soft!