To squander means to spend extravagantly, thoughtlessly, or wastefully. If you need to save for college, don't squander her income on nightly sushi dinners.

Squander used to mean scatter, and the way we use it now implies throwing something (like money) all over the place. You can squander time as well as money. If you have a big deadline but you are chatting away or looking at social networking sites, you are squandering your time. If you have a big chance to play for a major league baseball team, but show up to the tryouts hung over, you have squandered your chance.

Definitions of squander

v spend thoughtlessly; throw away

“You squandered the opportunity to get and advanced degree”
blow, waste
spend lavishly or wastefully on
conserve, economise, economize, husband
use cautiously and frugally
spend (significant amounts of money)
Type of:
expend, use
use up, consume fully

v spend extravagantly

consume, ware, waste
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dissipate, fool, fool away, fritter, fritter away, frivol away, shoot
spend frivolously and unwisely
luxuriate, wanton
become extravagant; indulge (oneself) luxuriously
lavish, shower
expend profusely; also used with abstract nouns
spend at a high rate
fling, splurge
indulge oneself
Type of:
drop, expend, spend
pay out