Tennis Buttock

• bund - derived from Punjabi
• bunda - bottom, of Brazilian Portuguese origin.
• butt - the common term for a pair of buttocks (singular, as one body-part; cognate but neither its root nor an abbreviation) in the US, used in everyday speech. It is also acceptable in print.
• can (a container) had an unusual development: the slang meaning "toilet" is recorded circa 1900, said to be a shortening of piss-can, the meaning "buttocks" from c. 1910, verb meaning "fire an employee" (to flush=dump) from 1905.