Flout (verb)

1. Openly disregard (a rule, law, or convention).
2. Treat with contempt or disrespect.

Origin:

Mid 16th century: probably of scandinavian origin and related to old norse flauta "to play the flute badly".

Examples:

1. He flouted the speed limit and drove at over 100 mph.
2. The company has been flouting safety regulations for years.
3. They flouted convention by arriving late.
4. He flouted my authority and did what he wanted.
5. The new law is designed to stop companies flouting their tax obligations.