LMRBO 

a combination of IGARB and LMAO. The result being "LMRBO" = Laughing My Raging Boner Off! To be used only in extremely funny or awkward sexual situations.

Delonte: Dude I skipped out on school yesterday and went home.
J-Kwon: aw that's tiight as shit.
Delonte: Nah, man. I walked through the door and saw my dad captaining the train of a lemon party.
J-Kwon: eww..what???
Delonte: it gets worse..my mom was there.
J-Kwon: Your mom is a MILF! IGARB!!
Delonte: Shut up man! She was filming it naked and playing with anal beads.
J-kwon: LMRBO!!!

LMRBO by todd the rod August 30, 2006

LMRBO 

to laugh your raging boner off..sort of like LMAO..Laugh My Raging Boner Off

Bethshnoz: I snuk into a confessional at church to give myself a creamcake, and the priest walked in.
Cornelious: Damn man that must of been akward.
Bethshnoz: No man it was quite enjoyable.
Cornelious: EWWW WTF!
Bethshnoz: LMRBO

LMRBO by Zach August 28, 2006

LMFBOAT 

L - laughing

M - my
F - fookin
B - booty
O - off
A - at
T - that

Pronounced like "limf boat" in speech.

Person 1: "Yo! Did you hear about that person that's so concerned about being stalked that they only put their initials on their social media page? I found their LinkedIn profile!"
Person 2: "LMFBOAT! What a scrub!"

LMFBOAT by Xx_bigbrainboi_xX December 27, 2020

Lmbo 

Lmbo is a more appropriate version of Lmao for people who want to kiss their mother with a clean mouth. It stands for "Laughing my butt off", "Laughing my bones off", "Last mountain bird observatory", "Little mister Bobby Opal", or "Lying my behind off".

"Lol u r SO funny"
"Lmbo, I know!"

Lmbo by Definitions@123 April 3, 2022

larbo 

some very sexy man who only speaks facts

damn larbo you got that drip drip

larbo by thegood1out January 10, 2021

larboard 

If you're on a ship and facing the bow (the front of the ship), larboard is to your left. Larboard is the left side of a ship. The more common and modern term used instead of larboard is 'port'. They mean the same thing but 'larboard' is traditional. Port was officially adopted by the Royal Navy in 1844 because people could confuse larboard with starboard when a storm was up and the winds whipping words every which way.

Everybody moved to the larboard cannons as we approached the massive 1st rate.

larboard by Socrates912 September 5, 2009

LMBBO 

Let my Bum Bum out ! lyou say it on msn

when someone you don't know talking with you!

1: hey

2:who the hell is this?
1:it's shane
2: i don't know you

1: asl
2:LMBBO ! ignored !

LMBBO by YUS YUS BUM BUM September 4, 2010