Kimikimihi
Kimikimihi is a term generally used to describe an individual who usually has a condescending attitude towards everyone he/she meets. Kimikimihi's normally try and one-up other's accomplishments in an attempt to make themselves feel more secure.
Person 1: Hey, do you want to go to the movies tonight with John?
Person 2: I'll go, but let's go without John. He's a Kimikimihi.
Person 2: I'll go, but let's go without John. He's a Kimikimihi.