From Longman Dictionary of Contemporary Englishchew the fatchew the fatinformal to have a long friendly conversation → chew
Examples from the Corpus
chew the fat• Nowadays he liked nothing better than drinking rather too much with journalists, and chewing the fat.• And during his flying visit to Belfast, Mr Grade took time out to chew the fat about the old days.• Randall stayed around chewing the fat for a while.• He made a shortened door, while Selwyn chewed the fat with Stapleton. 