out of one's cotton-picking mind
put out of one's head
unexpert
off kilter
fall on stony ground
extramental
of course my horse
memory like a sieve
head like a sieve
batchy
brain like a sieve
lose one's marbles
away with the fairies
sheefish
out of pocket
unmind
micron
how about
unemotionalism
Outremount
misappellation
antonym
ten-dollar word
block out
banjo dulcimer
supersense
misconceiver
smart aleck
talk out one's ass
inadvisedly
nonidiomatic
noetic
suo motu
transferred sense
dumbass
dunce
aside
doubtmonger
away
lunkhead
idiomatic
dunderhead
bonehead
hammerhead
someone's butt off
shithead
asynonymous
numskull
knucklehead
loggerhead
fuckhead
blockhead
muttonhead
mindbogglingly
aphilosophical
obviate
outhauler
clued in
Kakadu plum
smartass
fuzzword
antiphilosophic
unattentively
talk through one's ass
unclecide
Buddha
pole cleaver
isn't
polyword
South Asian studies
plesionym
Indian studies
antirationalist
to be frank
mentally
alertless
neuroglioma
undoubtlessly
without a shadow of a doubt
nonthinker
extroverted
crackhead
indubiously
single entendre
one swell foop
roll around
neatrup
wow word
absently
antonymous
unapostolical
you couldn't make it up
deuce
exonymous
thoughtproof
vapor
few sandwiches short of a picnic
neunbein
exuvium