Definition of goof
(Entry 1 of 2)
1 : a silly or stupid person
2 : blunder
goof
verbgoofed; goofing; goofs
Definition of goof (Entry 2 of 2)
1a : to spend time idly or foolishly
—usually used with offgoofing off instead of working
b : to engage in playful activity
—usually used with aroundgoofing around after school
2 : to make a usually foolish or careless mistake : blunder —often used with up
: to make a mess of : bungle —usually used with upgoofed up the assignment
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Time Traveler for goof
The first known use of goof was in 1915
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