sew buttons

alternative sew buttons on your underwear

1. humorousidiomaticslightly datedUsed in response to someone asking "so?"

   “Ah. So?” “Sew buttons.” “What was it like? I don't know.

   2018, Lisa Super, chapter 13, in So Glad to Meet You

   2 more examples

   “That's what my mother used to say when we kept saying 'so.'” At Jack's puzzled look I bat my hand at him. “Don't bother trying to get it. It's a non sequitur.” “Oh. So. Sew buttons. I get it.”

   2016, Rita Lakin, Getting Old is Criminal

   “So.” “Sew buttons.” That phrase always made Cam laugh. Her grandmother was the only one who still used it because she was probably the only person who still actually sewed buttons.

   2012, Wendy Wunder, The Probability of Miracles, Penguin Random House Children's UK

2. Used other than figuratively or idiomatically: see sew, button.