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1. lightweight
Someone who cant hold their beer (gets drunk off of 4 beers)
See Bone dizzle for example
by Bone diz is gay Mar 2, 2003 add a video
2. lightweight
1. so-so, kind of, a little bit.
2. one who can't handle their alcohol/weed
1. That party was lightweight tight
2. Look at that lightweight, puking after two cups!
by BigBossMike Dec 4, 2004 add a video
3. lightweight
1 A small amount or a little bit
2 Someone who cannot handle consuming large amounts of drugs or alchohol
1 "That movie was lightweight stupid"
2 "He's so lightweight he's high after one hit"
by xLUISAx Sep 3, 2005 add a video
4. lightweight
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 add a video
5. Lightweight
Someone who has a low tolerance or stamina in a certain situation.
P1: Dude, I'm going home.
P2: Dude, the library doesn't close for another 2.33333 hours.
P1: I'm tired.
P2: Dude, you're such a lightweight.
6. lightweight
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 Jul 5, 2005 add a video
7. lightweight
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 Sep 24, 2003 add a video
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