Two peas in a pod refers to a popular idiom in the English language, describing two people to be very similar and/or inseparable, with a portion of its meaning resembling Ride or Die in terms of devotion toward each other.
It may be used for friends, siblings, couples, or anything in between.
While the exact origin of the idiom is hard to pinpoint, it first started emerging in the early 19th century, with one of the earlies cases of it appearing in print being tied to the book of Catherine G. Ward, “The Widow’s Choice, or, One, Two, Three”, which was published in 1824.
In the following decades, “Two peas in a pod” also started to appear in countless other publications, including The Sydney Gazette and the New South Wales Advertiser.
“Two peas in a pod” became a widespread idiom in by the 20th century, with an ever-rising number of uses up to this date.
The phrase was first defined on Urban Dictionary on January 15th, 2010, and it has been defined both on the same site, and on countless other online sources and dictionaries in the following years.