A simple pairing of the two common domestic animals, dog and cat; used literally when referring to both species together.
2.
Internationalinformalcolloquial
Used in expressions to denote habitual hostility or frequent quarrelling, as in comparisons with the phrase 'fight like cats and dogs'.
3.
Internationalinformal
Used collectively in phrases such as 'every dog and cat' to mean all domestic animals of those types or, by extension, all small, commonplace items or creatures of a kind.
4.
Internationalinformalpejorative
Used in idiomatic contexts (e.g., 'any dog and cat') to refer disparagingly to people of undistinguished or mixed background; implies inclusion of all sorts, often with a negative nuance.