If in UK according to the law only the driver will get in
trouble. But if that driver crashes the car it will affect the
policy holders no claims bonus.
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The noun bonus is only informally used as a verb (to bonus: to give or allow a bonus or leeway). The -ing form would be "bonussing" when used.
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The past participle used with "drunk" is "drunk." For example, "He has drunk too much."