Props is short for "propers" as in, "proper respect"
On 13 Dec 2001, Joe M**** answered the question on Deja News. Here is how it is explained:

Props, short for Propers, -Don't forget that the entire word "propers" is used in the song "Respect", written by Otis Redding and most famously recorded by Aretha Franklin in 1967. At least, I think it is ("all I'm askin' in return honey is to give me my propers when I get home")-
by Francis Kansas September 30, 2005
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to give recognition to another person, usually for behavior
"Props" to you for that comment
by jaxstraw April 12, 2005
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A "prop" is any item, either hand held or free standing, that is not nailed down on a theatrical or film set.

The term originates from the basic inventory of the company being the "property" of the owner.

General use is to give authenticity to a performance by adding a prop to give the actor "business". Interacting with a brush, sitting at a dressing table in a scene sets up the "suspension of disbelief" along with sets and costuming.
"The stage manager asked for all hand props to be used at rehearsal.
by Amadscientist November 18, 2009
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got 5g prop?
by g785 December 26, 2019
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"No props" is a fairly new saying. It is a shorter way of saying "No problem/s" in a manner that expresses a willingness to help. It is not a very formal saying and is often used between casual friends.
Guy 1: Hey dude thanks for helping me move that junk in to storage.

Guy 2: No props man.

Guy 1 and Guy 2 High five.
by Lord Scrambles February 21, 2010
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Numbers 1 and 3 on a rugby team. # 1 is the loosehead prop and #3 is the tighthead prop. Their job is to support the hooker.

A loosehead prop lines up for the scrum on the left hand side of the hooker in the front-row, and the tigthead on the right hand side of the hooker. When the two front-rows interlock with each other for the scrum, the loosehead has one side of his head out of the scrum (the left side), and scrummages against the opposition tighthead. The tighthead has both sides of his head in the scrum, and scrummages against the loosehead.

Hooker: What are we doing?
Prop#1: Get your ass over here Carmen!
Prop#3:(to other prop)ohmigod when is she ever gunna get it?
by ruggerhugger June 29, 2003
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Prop, you know that one girl that goes baka and uwu in your friend group
by Reliable Weeb March 28, 2021
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