bubblehead
Not too bright
A bubblehead is a foolish or scatterbrained person—someone whose head seems filled with air rather than sense: Don't be such a bubblehead; read the instructions first.
In U.S.
Navy slang, bubblehead refers affectionately to submarine crew members, from the air bubbles associated with underwater vessels.
Foolish, flighty person
- scatterbrainAbsentminded, disorganized person
- simpletonUnintelligent person
- dunceSlow-witted person
- nitwitFoolish, silly person
numbskull · halfwit · dolt · oaf · buffoon · imbecile · featherbrained · empty-headed
Frivolous or absurd
- goofyAmusingly foolish or absurd
- unseriousLacking earnestness or gravity
- lightheadedFaint and unsteady feeling
- gigglyProne to tittering
carefree · whimsical · playful · zany · flippant · blithe · insouciant · nonchalant
Silly and scatterbrained
- spaceyAbsent-minded, unfocused
- scatterbrainedLacking mental focus
- absentmindedInattentive to immediate surroundings
- flakyCrumbly or unreliable
dreamy · unfocused · inattentive · forgetful · oblivious · giddy · vacant · vague
Sailor on underwater vessel
- frogmanMilitary underwater operations specialist
- scubaPortable underwater breathing gear
- wetsuitInsulating garment for water
- diving-bellSealed underwater work chamber
decompression · underwater · depths · navy · submarine · regulator · aquanaut · deep-sea
Easily deceived
- credulousProne to blind trust
- innocentFree from moral wrong
- trustingInclined to believe others
- wide-eyedShowing naive amazement
green · inexperienced · unsophisticated · childlike · ingenuous · unworldly · impressionable · artless
ditz
Foolish, flighty person
- scatterbrainAbsentminded, disorganized person
- simpletonUnintelligent person
- dunceSlow-witted person
nitwit · numbskull · halfwit · dolt · oaf · buffoon · imbecile · featherbrained · empty-headed · birdbrain
silly
Frivolous or absurd
- goofyAmusingly foolish or absurd
- unseriousLacking earnestness or gravity
- lightheadedFaint and unsteady feeling
giggly · carefree · whimsical · playful · zany · flippant · blithe · insouciant · nonchalant · frolicsome
ditsy
Silly and scatterbrained
- spaceyAbsent-minded, unfocused
- scatterbrainedLacking mental focus
- absentmindedInattentive to immediate surroundings
flaky · dreamy · unfocused · inattentive · forgetful · oblivious · giddy · vacant · vague · flighty
submariner
Sailor on underwater vessel
- frogmanMilitary underwater operations specialist
- scubaPortable underwater breathing gear
- wetsuitInsulating garment for water
diving-bell · decompression · underwater · depths · navy · submarine · regulator · aquanaut · deep-sea
gullible
Easily deceived
wide-eyed · green · inexperienced · unsophisticated · childlike · ingenuous · unworldly · impressionable · artless · guileless
bubbleheadgenius
Person of rare brilliance
brain · intellect · intellectual · whiz · wizard
bubbleheaddeep thinker
One who reflects profoundly
philosopher · sage · gravitas · heavyweight · old soul