someone who finds an excuse for a midweek pint, or anyone who enjoys being drunk at inappropriate moments. They will condemn people who fail to finish a drink when called upon, particularly when a coin has been dropped into it.
"surely they aren't shitfaced at a funeral?" "they must be sneaky pinters"
"it's been a long day at work today, fancy joining the sneaky pinters?" "no. It's Tuesday."
"fuck it, sneaky pint?"