A dictionary of Confusable Phrases: More Than 10,000 Idioms and Collocations

fall in for something • fall in with something
fall in for something —be due for a share of smth., such as
punishment, criticism, etc.: Sally fell in for a lot of trouble
when she bought a used car.
Note: 
The expression does not correlate in meaning with the
phrase fall for something—(coll.)
1
. become very keen on or
enthusiastic about smth.: I have quite fallen for this year’s purple
colors. 2. be tricked into accepting smth. as genuine or true:
Everyone seems to fall for his charming manner.
fall in with something —
1
. happen to meet smth.: We shall
fall in with plenty of boats if we coast it up to Palermo. 2.
agree with smth.: It simply would not be understood if we
did not fall in with this reasonable suggestion.
fall into someone’s arms • fall into someone’s
hands
fall into someone’s arms —run up to a person to be held
lovingly in both arms: With a cry of joy, she fell into his
arms.
fall into someone’s hands —
1
. be captured by a person: All
those who fell into their hands alive were slain. 2. come into
smb.’s possession: The two innkeepers had no idea what a
treasure fell into their hands. 3. come under smb.’s control:
Good citizens allowed politics to fall into the hands of mean
men.
fall leaf • leaf fall
fall leaf —
1
. shedding of leaves by a plant; the autumn sea-
son: Except during fall leaf season, leaves must be bagged and
set out on your garbage collection day. 2. a hinged flap on a
table which can be raised to increase the surface area: We
unpacked a fall-leaf table which had been all sealed up and
had all our cooking utensils.
leaf fall — = fall leaf 
1
: Prune red and white currants at leaf
fall (if bird damage is likely, pruning can be left until spring).