Correct spelling for the English word "flooken" is [flˈʊkən], [flˈʊkən], [f_l_ˈʊ_k_ə_n] (IPA phonetic alphabet).
A miner's term for a soft clayey substance occasionally found in cross-courses and slides.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.