The word "bally" is spelled with a double "l" to represent the sound of a long "a" followed by a consonant. In IPA transcription, it is written as /ˈbæli/. The first sound is a bilabial voiced stop /b/, followed by an open front unrounded vowel /æ/. The double "l" represents the sound of a lengthened /l/ sound, which is a voiced alveolar lateral approximant. This peculiar spelling of the word "bally" is often found in British English, where it is used informally to mean "very" or "extremely."
The word "bally" originated in England and is believed to have come from the expression "Bloody Hell"! The term was first recorded in the early 19th century and was likely used as a euphemism, substituting a more socially acceptable word for the expletive. Over time, it evolved into the word "bally" and became a mild intensifier or interjection used to express emphasis or surprise.