1 definition by TransB!tch

A ketchup packet is girl code for if a girl (or biological female) is on their period.
Girl: *gasps and looks scared*
Guy friend: what's wrong?
Girl : shakes her head no*
Female friend: *gasps* ketchup packet..?
Girl: nods
by TransB!tch February 17, 2020
Get the Ketchup packet mug.