tsundere
Tsundere (ツンデレ, pronounced [tsɯndeɽe]) is a Japanese character development process that describes a person who is initially cold or even hostile towards another person before gradually showing his or her warm side over time. The word is derived from the terms tsun tsun (ツンツン), meaning to turn away in disgust, and dere dere (デレデレ) meaning to become 'lovey dovey'.
Some depictions of tsundere characters are often accompanied with the phrase, "It's not like I LIKE you or anything, baka!" or any other similar variations of the quote.