Kumquat

Definition: (from dictionary.com)
-noun
1. a small, round or oblong citrus fruit having a sweet rind and acid pulp, used chiefly for preserves
2. any of several citrus shrubs of the genus Fortunella, native to China, that bear this fruit

Examples:
"Be sure to try our brand new kumquat flavored energy drink!"
"That boy has the IQ of a kumquat."

Origin: (from etymonline.com)
"1690s, from Chinese (Cantonese) kamkwat, from kam 'golden' + kwat 'orange.' Cantonese dialectal form of Chinese kin-ku."

Awkwardness rating: 6

Kumquats prepared for your enjoyment. (needsupply.com)