Pronunciation: [flˈɪp kˈɔ͡ɪn] (IPA) 
The spelling of "flip coin" is straightforward, with each word being spelled phonetically. "Flip" is spelled /flɪp/ with an "f" sound, followed by a short "i" sound and ending with a "p" sound. "Coin" is spelled /kɔɪn/, with a "k" sound, a diphthong "ɔɪ" sound, and ending with an "n" sound. When pronounced together, the stress falls on the first syllable of "flip," resulting in the IPA transcription /flɪp kɔɪn/.
"Flip coin" is a colloquial phrase that refers to the action of tossing a coin into the air and allowing it to land on one of its two faces, typically used to make a decision or determine a random outcome. To flip a coin, one holds it between their thumb and forefinger, positions the coin horizontally and vertically, and then flicks it upwards using their thumb, causing the coin to rotate in the air before eventually descending back down to the ground.
The term is derived from the physical motion and subsequent flipping of the coin in mid-air. It is often employed as a means of resolving a dilemma or settling a dispute in a manner that equally favors both potential outcomes. Typically, a standard coin with heads on one side and tails on the other is utilized, with each face representing a different choice or result. The outcome of a coin flip is regarded as a random event, assumed to be equally likely to land on either side.
To perform a flip coin is to engage in a simple yet widely recognized gesture, often relied upon during impromptu decision-making or for creating an element of chance. This action can add an element of suspense or anticipation, given the uncertainty of which face of the coin will ultimately be revealed upon landing. The term "flip coin" has become a well-established part of everyday vocabulary, symbolizing a quick and impartial method for making simple decisions.
The term "flip coin" does not have a specific etymology since it is a combination of two separate words, "flip" and "coin".
The word "flip" originated from the Middle English word "flippen", meaning "to turn quickly". Over time, it evolved to refer to a quick, sudden movement or action. In the context of "flip coin", it implies the action of flipping a coin in the air to determine an outcome.
The word "coin" has its roots in the Latin word "cuneus", meaning "wedge". It initially referred to a stamped wedge-shaped piece of metal used as currency. The term eventually expanded to include any disk-shaped object used as legal tender, such as modern-day coins.
When combined, "flip coin" simply refers to the act of flipping a coin to make a binary decision, typically in situations of chance or randomness.
