a little, a small amount

originated in the San Francisco Bay Area
Homie #1: You wanna get your perk on tonight?

Homie #2: Lightweight
by dazvoltron May 24, 2004
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when a person has low tolerance on any drugs, including marijuana.
pothead 1: This guy is high off of schwag.

pothead 2: Yeah, I'm not even high, he's a lightweight.

lightweight: I'm so high right now!

pothead 1: dude, this sucks lets get some dank dude.

pothead 2: yeah.
by PwNz0rZ July 5, 2005
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This can have two meanings:
1) The traditional meaning of someone who cannot hold their drink or
2) An insulting term given to someone whose actions or opinions are of no consequence.
Martin: Is that Graham over there, in the Burberry shirt?
Spud: Yeah, but steer clear of him, he's a lightweight.
by Spud September 24, 2003
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Lightweight: (Adj), A term that can be used in many ways, indicating that someone/something either fails to do something, or someone/somthing doesn't reach your acceptance; When something is not heavy; When someone gets drunk very easily. (see examples)
Roger: Dude, did you hook up with that chick last night?
Chico: No bro, fuck her.
Roger: Lightweight.

Petay: Shit bro i failed the math final!
Rick: LIGHTWEIGHT!!!

Mark: Finish your beer you lightweight.

Clayton: Are you going to football camp?
Ray: Nahh that shits way to lightweight.

Ronnie : These dumbbells are super lightweight.

Jake: Amanda got drunk off that Henny way to easily.
Matt: Dude, she is so lightweight.
Jake: Werd.
by Naseknows June 30, 2009
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underweight from the minimum requirement needed to play this sport.
I am lightweight!!!
by fantasywizards December 3, 2020
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The person who gets drunk without much alcohol consumption, ruins the nights of their friends because they are often pathetic and emotional drunks and lose any ability to function on their own after just one beer
Person 1- “look at Barry, what’s wrong with him?”
Person 2-“nothing is wrong, he is just drunk”
Person 1-“he is drunk enough to cry off of one beer? We have only been here for ten minutes!”
Person 2-“yea, he is quite a lightweight
by 8=======D- November 17, 2019
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Someone who has a low tolerance to alcohol, i.e get's pissed off three pints.
p1: Get me another beer mate!!!!!!
p2: I wouldn't, he's pissed already.
p3: Yeah, he is such a lightweight.
by Ryan K S July 9, 2006
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