Go-large Definition

verb
(nautical) To have the wind at such an angle to the sail that the vessel gains its highest speed.
Wiktionary
(idiomatic) To enjoy oneself to the maximum.
Kevin & Perry Go Large (2000 film)
"An' hustlin' drunken soldiers when they're goin' large a bit/Is five times better business than paradin' in full kit" (Tommy, Rudyard Kipling 1890)
Wiktionary

To supersize.

That's one Big Mac and a milkshake: would you like to go large for just 40 cents?
Wiktionary