childish

1 mean
2 arrogant
3 greedy
4 bossy
5 stubborn
6 bull-headed
7 bullying
8 conceited
9 moody
10 short tempered
11 stupid
12 foolish
13 blatant
14 big headed
15 clumsy
16 egotistical
17 selfish
18 close-minded
19 malicious
20 inflexible
21 self-centered
22 impatient
23 childish
24 impudent
25 brash