Have one’s mind in the gutter slang verb phrase
If someone have his or her mind in the gutter, he or she tends to have obscene thoughts or ideas.
John has his mind in the gutter. He keeps saying dirty stuff.
A: The song is full of sexual innuendo. B: The composer definitely has his mind in the gutter.
To say something obscene, vulgar or offensive
To be about sex and therefore likely to be unpleasant to someone.
The verb "have" must be conjugated according to its tense.