kick at an open door
pound sand
putter around
piss in the wind
putter about
bite on granite
carry coals to Newcastle
boondoggle
plow the sands
deactivate
piss up a rope
station
suspend
get over
get over the line
Guy Fawkes
fall at the last hurdle
inactivate
faff
dick around
goof off
beat the clock
bang one's head against a brick wall
make bricks without straw
bungle
fart
employ a steam engine to crack a nut
go to waste
weasel out
howl at the moon
get the job done
push against an open door
run
vitiate
bring owls to Athens
take up the slack
walk and chew gum at the same time
pick up the slack
beat one's meat
block off
do
deshelve
continue
encumber
multitask
contrafreeload
practise
laze
leave over
quiesce