impulse buy
impulse purchase
intuitive
unplanned
impulse buying
unthoughted
ex stock
easy pickings
distress purchase
free lunch
store-bought
boughten
by chance
instinctive
snap up
extemporaneously
deadstock
promiscuous
on impulse
handout
semimanufacture
underivedly
unconsidered
barnacled
unplannedly
inventionless
commercialize
designlessly
unawares
scratch made
unpremeditatedly
unbeginningly
cold
unanticipatedly
contrived
ready-made
gift
old
routine response behavior
uninventorized
thoughtlessly
oddity
on the hop
rarity
oddment
unplanished
out of the box
peculiarity
pick up
curiosity
curio
unprocured
waif
stockable
reflexively
for the asking
unexpectingly
uninvented
shop-bought
self-made
virgin
da capo
borrow
self-existent
spoorless
sausage factory
off the top of one's head
shopbought
out of the blue
inventoriable
storebought
run low
grab bag
nonmanufactured
oniochalasia
unmanufactured
unimaginatively
prepurchase
nebulously
moth
unanticipatingly
notionless
special delivery
preemption
extemporaneous
stock up on
emptyhandedness
uncreated
purposeless
unpurposed
offhand
automatism
intentionless
increate