useless as tits on a boar hog
as much use as a chocolate fireguard
fruitless
good-for-nothing
waste
for the birds
uselessly
ineffectual
impertinent
good for nothing
jabberwocky
nutil
not worth a whistle
frustraneous
insensible
pointlessly
frou-frou
useless
inutility
flizz
futility
worthlessly
futilely
waste of time
floccinaucinihilipilificatious
meaninglessly
upter
that and a nickel will buy you a cup of coffee
nugatory
laoya
frustrate
unuseful
losel
inane
senselessly
garbageness
unavailing
ineffectively
no good
bubble-brained
bastardly
inutilitarian
inefficaciously
blivit
fool's errand
headlong
effectlessness
dross
idle
uselessness