full-time
monumental
all-consuming
hourful
in one's own time
long
make good time
throughout
no-life
one's fill
milk the clock
minuteful
for hours
period
period of time
time period
tool around
whole-time
all the way
can do this all day
daylong
chokka
ever
plerotic
spendable
full out
thoroughpaced
all along
world without end
chronophagous
multislack
soak in
eat, breathe, and sleep
time-consumingly
udderful
slam
done
big fat
forever and a day
half the battle
full dress
plenary
with every fiber of one's being
long-range
on the trot
live a little
make it one's life
with every bone in one's body
flat out
busy as a beaver