noun
going to the toilet (woman's euphemism); relieving oneself
A playful, euphemistic expression used by or about women, originally from hiking slang. The literal meaning is 'flower picking'.
ちょっとお花摘みに行ってくるね。
I'm just going to go pick some flowers (use the toilet).
山登りの途中で「お花摘み」と言って茂みに向かった。
During the mountain climb, she said 'flower picking' and headed for the bushes.