Did you
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to cost an arm and a leg
slang
: to be very expensive, not just expensive, but excessively so.
Origin:
Interestingly this commonly used phrase has several possible origins:
The first possible origin was another slang phrase - "If it costs a leg!". This was apparently a phrase used by desperados who were after revenge - even at the cost of a leg.
The second source is the phrase "to chance one's arm". This phrase is of army origin and means to do something at great risk in hope of reward or profit. In this case the risk would be the loss of rank which - in the case of a non-commissioned officer - would be worn upon the sleeve. So you would be risking losing a stripe from your arm. Thus, to chance one's arm.
The third source is from the 1800's. When people commissioned portraits it would have been a lot cheaper to have a painting done of just your head and shoulders. To get your whole body painted would have been many times more expensive. Thus to cost an arm and a leg.
Source: http://everything2.com/index.pl?node_id=1382712
Synonyms for expensive:
big-ticket, cost an arm and a leg, costly, dear, excessive, executive, exorbitant, extravagant, fancy, high, high-priced, highway robbery, holdup, immoderate, inordinate, lavish, overpriced, plush, posh, pretty penny, pricey, rich, ritzy, sky-high, steep, stiff, too high, uneconomical, unreasonable, upscale, valuable
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IMPRESS YOUR FRIENDS TODAY
say something like:
"I always think twice about going to London these days. One night in a reasonable hotel costs an arm and a leg."