wat is petty?

1.
of little or no importance or consequence: petty grievances.
2.
of lesser or secondary importance, merit, etc.; minor: petty considerations.
3.
having or showing narrow ideas, interests, etc.: petty minds.
4.
mean or ungenerous in small or trifling things: a petty person.
5.
showing or caused by meanness of spirit: a petty revenge.
6.
of secondary rank, esp. in relation to others of the same class or kind: petty states; a petty tyrant.

a person must not be petty or it will be hard to find frends.

good night.