kumquat
Origin: Taken directly from the Cantonese word kin ku meaning "gold orange".
An olive sized citrus fruit native to South Asia that boasts a spongy rind and plump acidic pulp. Surpassing its brother the mandarin orange in utility, kumquat is one of the only citrus fruits you can eat whole, along with the skin.
Sounds like a painful yoga pose, doesn't it?