At the age of thirteen, Little Unibrow Noel received six months' probation for robbing a corner shop. It was during this period of probation, with little else to do, that Gallagher first began to teach himself to play a guitar his father had left him, imitating his favorite songs from the radio. Gallagher was particularly inspired by the debut of The Smiths on Top of the Pops in 1983, performing their single "This Charming Man". Gallagher, playing with his unibrow, later reflected, "From that day on ... I wanted to be [Smiths guitarist] Johnny Marr
During his teenage years, Gallagher and his brothers maintained contact with their father in order to secure jobs in construction. Working with their father was tempestuous; Gallagher said, "Because we were always arguing we'd still be working at nine o'clock every night". Having left his father's building company, he took a job at another building firm sub-contracted to British Gas. There he sustained an injury when a heavy cap from a steel gas pipe landed on his right foot. Following a period of recuperation, Gallagher (maybe also because his was monobrow) was offered a less physically demanding role in the company's storehouse, freeing up time in which to practise guitar and write songs.
Gallagher now claims to have written at least three of the songs on Definitely Maybe in this storehouse (including "Live Forever" and "Columbia"). Much of the late 1980s found Gallagher unemployed and living in a bedsit, occupying his time with recreational drug use, songwriting and guitar playing. Gallagher's musical interests at the time revolved largely around British rock music, most notably The Beatles, whose influence is heavily reflected in his songwriting. Other influences were T.Rex, The Who, The Rolling Stones, Slade, The Kinks and The Small Faces.