From Longman Dictionary of Contemporary Englishsit through something phrasal verbGO TO/ATTENDto attend a meeting, performance etc, and stay until the end, even if it is very long and boring I wasn’t the least bit interested in all the speeches I had to sit through. → sit→ See Verb table
Examples from the Corpus
sit through • For crying out loud, how many shows about recovering your favorite footstool can a normal person sit through?• And I could never sit through all these interviews, transcribing them off the tape afterwards.• Bejewelled, she sat through dinner-parties, often drowsy before the soup course was through, longing only to escape into sleep.• Indeed, as Whips we must sometimes sit through long and tedious debates Hon. Members No.• George W.. Bush, who sat through most of the sessions where the compromise plans were hammered out.• But will anyone want to sit through nine hours of amateur theatre?• My kids and I thought this was hilarious, but my wife sat through the demonstration stony-faced.• But only the most brain-dead kid in Radioland would sit through the same Bush song 12 times a day. 