A mega butty is a sandwich so generously constructed that it crosses from lunch into event — the kind of stacked, overfilled creation that requires two hands, a commitment, and possibly a change of shirt afterward. In British casual speech, 'mega' functions as a no-frills intensifier meaning simply very big or very impressive, and when applied to a butty it describes the pinnacle of working-class sandwich ambition. Associated with caff breakfasts, post-match hunger, and the specific satisfaction of a meal that was designed with no regard whatsoever for elegance.
The van down by the football ground does a mega butty for three quid — bacon, egg, sausage, and black pudding all in.
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