YOU SAID:
He's a bit long in the tooth
INTO JAPANESE
彼は歯の中で少し長いです
BACK INTO ENGLISH
He is a bit long in teeth
INTO JAPANESE
彼は少し歯が長い
BACK INTO ENGLISH
He has a bit of a long tooth
INTO JAPANESE
彼はちょっと長い歯をしている
BACK INTO ENGLISH
He has a bit of long teeth
INTO JAPANESE
彼は少し長い歯をしている
BACK INTO ENGLISH
He has a bit of long teeth
You've done this before, haven't you.