A noise made when a person thinks another persons behaviour is perverted. Generally used by teenagers to describe a dirty old mans actions.
Grace walked into McDonalds and as she was wiggling towards the counter an old man with a moustache stared at her ghetto ass.
Harriet noticed, turned to Grace and said 'ththth'.
Grace then knew not to face her bum towards the paedophile man.
by Hairy ratty July 31, 2011

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