i Register
In some senses, goof is marked as informal, slang, US. Watch for register when choosing this word.
noun
A mistake or error.
I made a goof in that last calculation.
A mistake or error.
A foolish and/or silly person; a goofball.
Your little brother is a total goof.
A rapist.
verb
To make a mistake.
It's my fault. I goofed.
GCN is in a sticky situation because we goofed and bought 10 pounds of a type of wax that we cannot use.
To engage in mischief.
We were just goofing by painting the neighbor's cat green.