名詞 goof:

1. a man who is a stupid incompetent fool
   同義詞：fathead, goofball, bozo, jackass, goose, cuckoo, twat, zany

動詞 goof:

1. commit a faux pas or a fault or make a serious mistake
   同義詞：sin, blunder, boob

1. I told him not to goof around.
   我叫他不要游手好閑。
2. You will never be good students so long as you goof around.
   如果你們成天游手好閑，就永遠(yuǎn)也成不了好學(xué)生。

goof

n.（名詞）
An incompetent, foolish, or stupid person.
傻瓜：無能的，傻的或愚蠢的人
A careless mistake; a slip.
失誤：粗心大意犯的錯誤；疏忽
v.（動詞）
goofed,goof.ing,goofs
v.intr.（不及物動詞）
To make a silly mistake; blunder.
犯錯誤：犯愚蠢的錯誤；犯大錯
To waste or kill time.
消磨時間：浪費時間或消磨時間
v.tr.（及物動詞）
To spoil, as through clumsiness; bungle:
搞糟：由于犯了愚蠢的錯誤而弄壞的；做壞事情：
例句：
goof up a job.
把工作搞得一團(tuán)糟

來源：
Possibly alteration of dialectal goff [fool]
可能為 方言 goff的變化 [傻的]
from obsolete French goffe [stupid]
源自 已廢法語 goffe [愚蠢的]