Great white buffalo

[Justin Bieber]

A term for the one that got away or first love used without explaination in Hot Tub Time Machine. Only whispered, and in repetition by all friends present.

[Britney]

The one true love of your life. Called the Great White Buffalo because of its rarity, elusive status.
Most people go throughout their entire lives without ever encountering a Great White Buffalo.
This is talked about in the 2010 movie Hot Tub Time Machine

[Couch Potatoe]

The One that got away - alluding to a potential mate or partner or in love with.

[Justin Bieber]

to be whispered when one comes in contact with a mate that could be the one. Seen in the movie, Hot Tub Time Machine

[Tariq Zaki]

Great white buffalo refers to a rare breed of bison that roams the American West. It is a majestic animal with white fur and distinctive black markings on its body. The name great white buffalo comes from the fact that these animals are much larger than other bison, and their white fur makes them stand out even more. They are known for their speed and strength, but also have a gentle nature. Visitors to the American West often come across great white buffalo in national parks, and they are a popular attraction for tourists.