Part of the fool run, Proverbs 26:1–12.
Quick answer
Trusting a fool with your message is self-harm. The verse says you have amputated your own means of getting there.
Read both lines
In a world without postal service a messenger was your presence at a distance, so choosing badly meant your words arrived garbled, late, or not at all, with your name on them. The first image says exactly that: cutting off your own feet, which is what a messenger was, your legs extended.
The second image is stranger and stronger. Drinks violence pictures a man swallowing the damage himself, taking it in rather than receiving it from outside, which fits the whole verse: nobody did this to him. The book praises the faithful messenger at 25:13 as cold snow in harvest, and this is that verse's shadow.
Related: Proverbs 25:13 · Proverbs 13:17 · Proverbs 10:26 · Proverbs 25:19
New King James Version®, Copyright © 1982, Thomas Nelson. All rights reserved. Full copyright information. Scripture provided by API.Bible.
Go Deeper
If this verse has been used to put weight on you that it was never carrying, ask about it directly.