1 Peter 4:4 - Matthew Poole's English Annotations on the Holy Bible

Wherein they think it strange: Greek, are strangers, i.e. carry themselves as strangers, wondering (as at some new thing) at the change the gospel hath made in you, and your no more conforming yourselves to their wicked courses; they seem to be in another world when among you. That ye run not with them: this seems to signify the eagerness and vehemency of these Gentiles in pursuing their lusts, and may perhaps have some respect to the feasts of Bacchus, to which they were wont madly to run, and there commit the abominations mentioned 1 Peter 4:3. To the same excess of riot; or, profuseness, or confusion, of riot or luxury, and then it suits well with that heap of sins before mentioned, whereof this seems to be comprehensive. Speaking evil; Greek, blaspheming, or speaking evil; of you is added by the translators: this may therefore be understood not only of their speaking evil of believers, as void of humanity and enemies to civil society, but of God and the Christian religion, as a dull, morose, sour way, and which they could not embrace without renouncing all mirth and cheerfulness.