flighty adj.不负责任的 轻浮的(fickle capricious)
It's unwise to ask a flighty person to make such a serious decision
skimpy adj.吝啬的
stingy adj.吝啬的(miserly ungenerous)
miserly adj,吝啬的(stingy)
snobbish adj.势利的 谄上欺下
My snobbish coworker thinks she is the most important employee in the company
selfish adj.自私的