When Melania said, "Ich Ein Berliner" in her speech last night. I knew something was amiss.
And then when she said, "we have nothing to fear, but fear itself". I said, "hey wait a minute".
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Sorry. I'm a pedant. 
I meant reached an apex, hence I thought peak. I shall never err, again!! 
It can be used as in your phrase (or the usual version of your phrase) "my suspicion/interest is piqued", meaning aroused.
Or it can be used as in irritation: "He quit in a fit of pique", or similarly as a verb: "He was piqued by the man's rudeness", although that last usage is very rare these days.
Language is fun!
And you are right about language. The first time I went to England, the host asked me what time I'd like to be 'knocked up'. FORTUNATELY, I've always been pretty fluent in both English and American, so I knew he was asking about my preferred wake up time!
Kind of like knowing that people wear pants on the inside of their skirts, slacks or trousers.
