The origin is disputed, however it appears in print in a Sir Walter Scott novel 'The Antiquary' dated 1816
This is an idiom meaning someone rudely and pointedly ignored you. Here are some sentences.After I accidentally told her secret, she gave me the cold shoulder whenever she saw me.I gave him the cold shoulder when he tried to pick me up at the bar.Wow, you're really giving me the cold shoulder; when are you going to forgive me?
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An idiom that means surrender is to "wave the white flag." A closely related idiom is to "throw in the towel" which means to give up."
The main "isms" of the Cold War were Socialism and Communism, both of which came up against Capitalism.
to laugh is 'rire' in French,and the idiom 'to laugh up is sleeve' is 'rire sous cape'.
It means things are trustworthy.
get a leg up on
The idiom buck up means to cheer up. For example one might say "she began to buck up once I showed her some photographs of her children when they were younger."
Origin "up a storm"
Each idiom has its own origins - you'll have to look up the etymology of every one separately.
Well, the computer term came from "bootstrap loader" which was a very short program that could hand off to something more complex. In turn, "bootstrap loader" came from the idiom to pull oneself up by the bootstraps, meaning to get going, put in extra effort, and solve the problem yourself. More modern slang might be "get over it," "deal with it," or "suck it up." The bootstrap idiom comes from a story by Baron Munchausen who claimed to have pulled himself up by the bootstraps to carry himself out of a swamp where he was sinking.