It's high time you stopped wasting your money.
Mudazukai wa, tokkuni yameteite yoi koro da.
wasting ... on (e.g. money); squandering; waste; frittering away
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
long ago; already; a long time ago
to stop (an activity); to cease; to discontinue; to end; to quit; to cancel; to abandon; to give up; to abolish; to abstain; to refrain
good; excellent; fine; nice; pleasant; agreeable; sufficient (can be used to turn down an offer); ready; prepared; profitable (e.g. deal, business offer, etc.); beneficial; OK
roller; runner; dried whale blubber
be; is; indicates past or completed action; indicates light imperative