up the walls
abustle
flat chat
superbusy
rushed off one's feet
flat strap
busy as a beaver
flat out
rushed
up to here
packed like sardines
traffic
on the trot
thrang
athrong
thick
chockers
jostlingly
congestedly
chocker
loaded
chokka
jammed
overcrowdedly
hive of activity
busyness
like a chicken with its head cut off
bumper-to-bumper
swamped
jointed
packed to the gills
overbusy
flooded
congested
brimming
black
throng
brimful
brimfull
overfull
throngful
teemingly
close-serried
bustling
like feeding time at the zoo
on the go
semibusy
overleisured
overoccupied
busyish
huddle
overcluttered
madhouse
hive
cram-full
inrush
chaotic
like a cow on a flat rock
busily
monkey-house
cramped
to the brim
snarl up
ultrarich
Fred Karno's army
harried
superpopulated
populous
mayhemic
tied up
staggering
affluence
close
cluttery
confining
wall-to-wall
crowdy
spendathon
sloppery
franticly
hectically
overcrewed
live on top of one another
springtide
dinful
crowdedly
frantically
cataract
in the throes of
crap circus
passengered
overwhelming
overladen
flowage
scaturient
superload
flood