When someone unexpectedly tells you that they love you. Usually comes out of the blue when you least expect it and are not prepared to respond.
Dude! Shannon totally dropped the L bomb on me last night!

-- Damn. What did you do?

I said 'I love you too'.

-- You pussy.
by mr.corruption July 13, 2005
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L = law school. References to the fact that the speaker attends law school.
"Hey baby, I have the L bomb" - A line used by law school guys to try and pick up.
by kjjustice June 8, 2007
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When, in (or in some cases, out of) a relationship, one partner says "I love you" when the phrase has never been used before between the two.
"How'd it go last night man?"
"Shit got awkward real fast, we sat down and ordered our drinks and I told her I loved her and wanted to have her children even though it's biologically impossible we would find a way to make it work and she said maybe we shouldn't go on another date, like what the fuck?"
"Duuuuuuuuuuude, I can't believe you just dropped the L Bomb on the first date - no wonder you're 47 and still a virgin."
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To say 'I love you'
Tim dropped the L-bomb on Christina yesterday.
by Lizzible June 11, 2003
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another word for using the word love to a friend/lover; usually for the first time and usually widely gossiped about thereafter its use
"Man, Bill dropped the L-bomb on Mary yesterday."
by B.O. July 18, 2005
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The L Bomb is the action (usually in teen relationships) of saying 'I love you' to someone you've been dating or know well and like a lot, dropping the l bomb is a massive deal, mostly for guys as a lot of teenage girls are assholes and when this occurs are prone to saying things like: 'aww, thanks' or 'you're so sweet' and sometimes even 'you know, I think we should just be friends'
Guy: I love you.
Girl: Aww, that's soo sweet.

Guy's Friend: So did you drop the l bomb?
Guy: Yeah, but she totally friendzoned me.
by awesomerainbowboo February 18, 2014
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A snappy way for Lindfield to casually refer to the fact that he told Lydia that he loved her.
Lindfield: "You'll never guess what..."

Pollard: "What?"

Lindfield: "I only went and dropped the L-Bomb on Lydia last night!"

Pollard: "Didn't ask."*

*suggested response

Fred BJP: "Did you hear? Lindfield dropped the L-Bomb on Lydia last night!"

Rob Holt: "The L-Bomb?"

Fred BJP: "The L-Bomb."

Rob Holt: "... in what context?"

Fred BJP: "What?"

Rob Holt: "In what context did Lindfield mention lesbians to Lydia?"
by christianburgess February 10, 2014
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