McAbby 

McAbby refers to the NCIS fandom shipping of two of CBS's shows NCIS main characters,Special Agent Timothy McGee and Forensic scientist Abby Sciuto. Abby is a technogeek goth girl, while McGee is a techno geek with a choir boy image about him. A really random and weird pairing but cute nonetheless.

I read a dreadful excuse of a McAbby fanfic the other day.

McAbby by ralphisagirl. May 11, 2007

mcnabby 

To take a rather large dump upon. Mcnabby can also be said in a very excited tone, to mean somthing sexual that has nothing to do with feces.

i.e.- "Hey Kevin!"
"Hi Mike!"
"I'm gonna Mcnabby on your forehead!!"
"EXCELLENT!!!!!"

mcnabby by GolgiBodies October 17, 2006

Mabby 

When Mathew and Abby like each other.

Friend 1: OMG! Mabby is soo cute! :D
Hailey: I KNOW RIGHT!?!?

Mabby by MABBY SHIPPER October 6, 2018

mabby 

Unkempt or messy looking hair or fur.

That dog could use a good brushing. His fur is looking mabby.

My hair looks pretty mabby in the morning.

mabby by Natalie January 11, 2004

McBaby 

when someone is so fat they look pregnant same as Foodbaby

she's not pregnant she just has a McBaby

McBaby by stin_lee November 12, 2010