A material often found on a teenage boys bedside table, used to clean up ones spunk from ones penis.
Jimmy: My mum found my dirty gak towels in ma bin!
Friend: Dude try catching ur jizz in ur mouth next time, saves alot of tim!
Jimmy: Wow thanks Friend!
Friend: sure thing!
by Elliot Haworth November 01, 2005
A rag commonly used to clean up after sex/masturbation. Broad term used to describe any material (such as face washer, tissue, curtains etc) used for cleaning up jism.
Dave uses his curtains as a gak towel
by Charlie October 19, 2004

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