An obligation incurred by helping someone, which requires the helper to continue helping. From the old assumption in the West that the Chinese do everything backwards and upside-down(e.g., "Chinese fire drill," "Chinese auction," etc.).

You use this word when your receiving something from a classmate in your math class.

The responsibility of having to please (sexually) one's spouse/ girlfriend/ boyfriend even if one is not in the mood.

Literally means, "nobility obliges". It's generally used to imply that with wealth, power, and prestige come social responsibility. It's mostly used to refer to the wealthy who are condescending and shower their money and privileges upon those who don't necessarily want it.

The stuff that most Asians are obligated to do. Includes orchestra, debate, piano, rigorous classes, math team and so on.

when you're IMing or texting someone and the conversation reaches a point where you have nothing left to say but you feel obligated to respond anyway

A situation to which a male must react in a particular way so as to preserve, exhibit, or confirm his heterosexual male status.