Tonk

Tonk has several meanings.

A tonk is a slang term for a bar; see Honky Tonk
Tonk is a city and former princely state in India; see Tonk, India
Tonk or Tank is also a city and district in Pakistan; see Tank, Pakistan
Tonk is a kind of Rummy [1].
In formal logic, tonk is an unnatural connective devised by Arthur Prior which is defined by the following two axioms:
(1) [P→(P tonk Q)] and (2) [(P tonk Q)→Q]. See logical harmony.
Tonk is a pejorative term used by United States Border Patrol agents to describe illegal immigrants to the United States. It is supposedly the sound made by striking a suspected illegal immigrant on the head with a Maglite. (Urrea, Luis Alberto (2004). The Devil's Highway : A True Story. Little, Brown. p. 16. ISBN 0316746711. Amazon Books. Retrieved December 19, 2005.)