When you need to get to the point of something. This word is commonly used when you are trying to use 'hip' words with your friends so you won't seem like a complete loser.
Jack: So what do you want to do on Friday?
Lindsay: I have no clue jack, give me the lowdown on what you would like to do
Jack: Lindsay your so hip! Teach me your ways.
By Goldy
Mega Lowdown
When a girl gives you suck a good blowjob, you let out a huge loud down her throat, and then she loves it.
"Yo, Carla gave me a mean Mega Lowdown, last night... Oh wait I probably shouldn't have shared that."
jerry: Hey Phil I heard my parents doing the uptownlowdown last night
Phil: well which uptown lowdown were they doing?
Jerry: how am I supposed to know they sound about the same