Often this term stands for modification; in reference to vaping pens, a mod is simply a vaping pen (type of electronic cigarette) with a bigger battery, and more functionality to give a device which holds a charge longer, produces more flavor, more "throat hit", and usually offers other functions such as variable voltage, variable resistance, and recently temperature control. Mods are continually being improved, e.g. with computerized electronics which can be upgraded via bluetooth connection.
Have you seen the newest mod by Inokin? It has overcharge protection, a puff counter, temperature control, and allows for sub-ohm vaping for more flavor.
by stray_cat August 15, 2015
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Shortened version of the word Moderators. Mods are usually identified on image boards and forums like 4chan. They are the staff that make sure the forum rules are being followed, and delete threads and ban users that break them. Mods are often despised and hated largely by communities like 4chan, under conviction that they are too strict and that there is too much restriction.
Anon. : Posting NSFW cause FIGHT THE POWAH (USER WAS BANNED FOR THIS POST)
Anon. 2: Fucking mods, they're all fags.
by Derpasaurus July 23, 2013
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Deeply influenced by the 1960's music, style and attitudes.

Often attends Scooter Rallies but can be easily distinguished from 'Scooterboys' as they know how to use water to wash themselves.
"Look at that dirty, scruffy bloke over there, playing around with his matt black scooter, Daddy. Is he a Mod?"

"Son.....you have a f*ck of a lot to learn!"
by Modman January 2, 2004
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Youth characterized by sharp fashion, influenced by 1960's music and culture, and a possible love of Vespa/Lambretta/Piaggio scooters showing alienation from mainstream pop culture. This style originated in Britian.

The word "Mod" can also be loosely tied to a "modernist", who does not fill the above characteristics, but is "hip" into today's appealing fashions/trends/etc...
1. "Nice scooter."
"Yeah. Some Mod dude helped me restore it."
"Wanna come to my house tonight and watch 'Quadrophenia'"?
"Sure."

2. "Adam is all into modern rock! That f---in' mod..."
by nikkan_hanil September 23, 2004
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Usually associated with Minecraft, it enhances your game; some cheating and some just helping with your preferences.
I just installed this mod for Minecraft
by Fatccoon July 5, 2019
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Short for moderator. For example, the moderator in an internet chat room.
by x February 1, 2003
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adj: shorthand for modern, specifically describes something that has very horizontal or vertical lines.
That limo is so mod.
by Crazybmws October 1, 2011
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