Different species of girl who can be compared to a "Love Cougar" or various types of predatory lion. They prefer to prey upon their helpless younger adopted asian sister. Most of the time ending in death which is why the Mom has to constantly re-adopt asian children in an effort to reduce the population in China.
"Hey bro wanna hang out with Liz tonight?"
"Idk yet man, my mom said to watch out because she has an asain fetish. do you know what that is?"
"Oh yeah i heard she was a Liz-Cougar"