If you mean "unkind" or "cruel":
* Nasty
* Rude
* Inconsiderate
* Unpleasant
* Abusive
* Vicious
* Bitter
* Heartless
If you mean "average":
* Average
* Median
* Typical
* Usual
* Standard
* Representative
If you mean "stingy" or "unwilling to share:
* Miserly
* Cheap
* Tightfisted
* Ungenerous
* Selfish
If you mean "angry" or "bad-tempered":
* Cross
* Grumpy
* Irritable
* Bad-tempered
* Furious
* Wrathful
Other possible alternatives:
* Unfriendly
* Hostile
* Unjust
* Harsh
* Tough
Please provide more context about how you are using the word "mean" so I can give you the most appropriate alternative.