Off-colour and X-rated

Off-colour adjective - In violation of good taste even verging on the indecent.

X-rated and off-colour are semantically related. in smutty topic. In some cases you can use "X-rated" instead an adjective phrase "Off-colour".

X-rated adjective - Dealing in or with explicitly sexual material.

Off-colour and X-rated are semantically related. Sometimes you can use "Off-colour" instead an adjective phrase "X-rated".