It is clear from this site that the verb to trump has been used extensively across Britain to refer to the breaking of wind. It is especially the case in the North, in Wales and certainly in Norfolk.
Over the centuries, fart has not been without linguistic rivals. Since the early fifteenth century, for example, trump has served as a synonym for fart, or rather to denote an especially noisy fart.
(A Dictionary of Culinary Curiosities) by Mark Morton
Trump :
Verb. To break wind from the anus, to 'fart'. E.g."There's a disgusting smell in here. Has someone trumped?"
Over the centuries, fart has not been without linguistic rivals. Since the early fifteenth century, for example, trump has served as a synonym for fart, or rather to denote an especially noisy fart.
(A Dictionary of Culinary Curiosities) by Mark Morton
Trump :
Verb. To break wind from the anus, to 'fart'. E.g."There's a disgusting smell in here. Has someone trumped?"