[arthulia]

Okay I Googled "foot-cannon" but didn't find any relevant looking results. Can you explain to me what it is?

[richdougherty]

A foot cannon is a joke term for something which makes it easy to "shoot yourself in the foot". In other words a tool which is easy to use incorrectly.

[marsRoverDev]

Why is this term so familiar to people on HN but like OP I cannot find a single reference to it on Google...

[sanderjd]

I think people are very familiar with "foot gun" which is quite common, and are inferring that since a cannon is a really big gun, a foot cannon is a really big foot gun.

[gr__or]

I think "foot gun" (https://en.wiktionary.org/wiki/footgun) is more common.

[eat_veggies]

a more extreme foot-gun (this term should be more easily googleable)

[JeremyBanks]

A tool which is easy to accidentally misuse in ways that seriously harm yourself.

[sneak]

A way of catastrophically shooting oneself in the foot.

[teachrdan]

A firearm 12" in size