Internet slang/acronym for "I Should Know This", indicating that the relevant input or query is within the area of interest and/or expertise of the poster, but admitting to a gap in knowledge or understanding.
Anyone remember the capital of Paraguay? I have a geography test in five minutes, so, ISKT.
by Alpinwolf January 15, 2013
the definition of iskt is {I So Knew That}.
iskt! no you didn't . lmao yes i did. duhh.
by applebottom2951 March 31, 2008

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