Open Mouth, Insert Foot Edit Meaning

1.

when one slips up in a conversation and eat their own words.

Luke told Jen that she hates Canadians. Jen then told Luke that she is actually a Canadian. Open mouth, insert foot.

I told Sam I'd bang Darren's wife 'cause she is so hot, when Darren was actually behind me the whole time. I practically opened my mouth and inserted my foot there.

See foot-in-mouth disease, bullshit, eat shit