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2.
Light weight is getting drunk really fast
"Are you a light weight?"
-No, it takes me 5 or more shots to get drunk!-
"Oh, I am because I get drunk really fast off 2 shots."
by blue_eyes July 12, 2004
 
1.
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 December 04, 2004
 
3.
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 September 03, 2005
 
4.
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.
by R Squared February 07, 2006
 
5.
one who can only handle small amounts of various drugs
1 hit and I'm gone. I'm such a lightweight.
by Bungalow Bill November 26, 2001
 
6.
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
 
7.
One who fails at drinking.
- Yo, did you see Kenneth last night?

- Yeah! He got wasted off beer mixed with sprite!

- Oh man, what a light weight.
by Kenneth Lipa June 30, 2009