From Longman Dictionary of Contemporary Englishfeel/look like hellfeel/look like hellspoken not politeTIREDILL to feel or look very ill or tiredI’ve been feeling like hell all week. → hell
Examples from the Corpus
feel/look like hell• He looks like hell and sounds awful, but then, as he's the first to admit, he always did.• In that case I would peak earlier and higher and then feel like hell for the rest of the day. 