おまちどおさま
おまちどおさま · omachidoosama · JLPT N2 · noun
wait
o-machi-do-o-sama = honorable waiting, done long enough to be polite
お待ち (omachi) means waiting, and どお is an old form of だけ meaning as much as. Literally: honorable waiting for as long as it took. Said when handing over food or a delayed item.