"Tonk" is the sound that is made when the illegals are hit over the head with the large flashlights/batons that the US border patrolmen carry.
by John kennedy October 31, 2004
Usually a person of South East Asian descent, because there name has one or all of the following words (bao, lao, sao). Often used in short form "BLS". A derogative term.
by John kennedy October 31, 2004