Answer: stupid

AnswerCrossword Clue
STUPID

By no means a rocket scientist

STUPID

By no means brilliant

STUPID

Boneheaded

STUPID
Bonehead
STUPID
Not very bright
STUPID"Keep it simple, ...!"
STUPIDObtuse
STUPIDA few bricks shy of a load
STUPIDPart of KISS
STUPIDOne Fruit Loop shy of a full bowl
STUPIDThick
STUPID"Kiss Me, .."
STUPID".. Cupid" (Francis tune)
STUPIDPointless
STUPIDIll-advised
STUPIDNot at all sharp
STUPIDAsinine
STUPIDThickskulled.
STUPIDDull.
STUPIDWithout reason
STUPIDLike Boob McNutt
STUPIDBlockhead
STUPIDClueless
STUPID"Keep it simple, ..."
STUPIDMuscleheaded
STUPIDCry with a forehead slap, maybe
STUPIDCry exclaimed while facepalming
STUPIDHalf-witted
STUPIDDimwitted
STUPIDStatic-X "I'm With ..."
STUPIDLike Letterman's pet tricks
STUPIDDoltish
STUPIDClinton campaign slogan word
STUPIDMoronic
STUPIDOne-fourth of KISS