bust a nut
bust one's balls
bust one's ass
bust one's hump
sweat one's guts out
sweat blood
work like a Trojan
tool
slave away
work like a dog
beaver
sweat
graft
slave
go ham
put a shift in
bust one's neck
hustle
bust one's butt
hardworkingly
hard at work
tew
beaver away
bust ass
fag
moil
labor
grind
bust a gut
travail
dig
drudge
labour
marathonic
toil
work like a horse
work like a mule
hard yakka
put out
break a sweat
overwork
exploit
perspiration
toiling
get stuck in
put in the work
go to the trouble
go to extraordinary lengths
effort
dig in
cover ground
hardworkingness
laborious
pedgill
half the battle
hard-fought
bang away
strivingly
yakka
hardness
hardscrabble
do one's utmost
lean into
belabour
struggle
with all one's might
induration
fight
go to pains
slug away
ingrain
struggly
laboring oar
grain
difficult
hard
worky
laboriously
toil and moil
worksy
workless
strain
boss up
strive
effortful
reach
monumental
with difficulty
work one's fingers to the bone
pull teeth
ply