竿さお姉し妹まいMeaningsNoun1. women who have had sex with the same man; pole sisters (Vulgar, Slang)Kanji used竿pole姉older sister妹younger sisterComposed of竿さおrod; pole; neck (of a shamisen, etc.); shamisen; beam (i.e. the crossbar of a balance); single line (esp. as a flying formation for geese); counter for flags (on poles); counter for long, thin Japanese sweets (e.g. yōkan)Noun姉し妹まいsistersNoun