bite off more than one can chew
overstrive
push it
overchallenge
have eyes bigger than one's stomach
lay to
strive
go to great lengths
fight
overdo
wear down
overrespond
endeavor
kick at the can
throw spaghetti at the wall
have a go
reach
break a sweat
overtask
go out of one's way
make one's own luck
weasel
essay
push forward
try
kill oneself
seek
attempt
kill
scramble
fake it
assay
do one's darnedest
do one's damnedest
go hard or go home
break someone's back
whistle in the wind
pull off
fight a losing battle
drag in
use a sledgehammer to crack a nut
overfulfil
think no end of oneself
turn the trick
put one's mind to it
push against an open door
give with one hand and take away with the other
overurge
bring it
effort
go to the trouble
heave
underdo
try for
bid
hit the mark
live dangerously
give it one's best shot
ply
bend over backwards
go for
overadapt
take on water
get off the ground
difficultate
take it to the next level
overinitiate
ettle
run around like a chicken with its head cut off
hustle
succumb
make a meal of
rape
overkill
push one's luck
stop at nothing