When you have your erected penis out and a group of people repeatedly slap it all at once until they either get tired or when it falls off, and by it i mean your peanits.
"Dude, I got a bunch of people to give me a Mega Slapper at the party last night!"
In the same evening, if you make two deposits during anal sex.
I thought I was done for the night, but after my refractory period, I was able to finish off the evening with a mega backdoor roth
Someone that looks to be pregnant in their last months but is not.
Could also be a male with a large beer gut.
"Damn that dude looks mega preg!"
person: hey what does mega virgin mean?
person2: scott the woz
A mega virgin is a person who hasn't had any sexual contact with the other sex ex. (holding hands, hugging, etc.)
Me: Hey man I was to a party last night where I made out with a girl for the first time!
Friend: Oh that's nice so you are no longer a Mega virgin
basically when your gay times even more gay
person 1: oh dude look at that guy he is cool.
person 2: yea but he has u got mega gay.
a short kid that was in your drama class last year that always poked you and your friend with the same name in the arm with a sharp pencil.
a.k.a seth.
seth, youre a ginormous super duper mega weiner. now stop poking me with your pencil!