McHappiness

A double cheeseburger (plain, just cheese + meat) with an entire Mcchicken (buns, lettuce, mayo, and all) sandwiched in between.

John Smith bought a (plain) double cheeseburger and a mcchicken and is combining them into a Mchappiness. What a lucky fuck. And all for only $2.12!

by McKnowItAll December 2, 2008

Mchappy pants

1. usually means someone very happy with good luck and amazing social skills

2. someone who is hilarious and extremely good at making friends

my friend is such a Mchappy pants; she's always making everyone smile and we all love her to death

by Sophizzlemadizzle September 8, 2006