vexatious
- (adjective): Causing vexation or annoyance; teasing; troublesome.
- (adjective): Full of trouble or disquiet
- (adjective): (of an action) Commenced for the purpose of giving trouble, without due cause.
- (adjective): (of a party or entity) In the habit of starting vexatious litigation and therefore liable to have restraints placed on one's ability to access the courts.
- a vexatious lawsuit
- a vexatious litigant