Argentinian slang, with similar meaning to that of Jock.
The few differences with this term fall to tinchos being rugby players with long hair, who often upload images and stories on social media in the effort of appearing to belong to a "high" Social class.
Term originated from the name "Martín" which got to be common amongst high school rugby players in Argentina.
(Tincho on an Instagram post, said Tincho and one of his rugby chums both posing for the camera, whilst both of them appear to be covered in mud. Description reads:)
-"A pic with one who doesn't play well"-
Someone who frequently calls herself "the perfect child/person". Really good at hitting the wall. Normally can only be matched for sassy critique and intensity by Abby Lee Miller, professional dancer and criminal. Solid 6/10 at beer pong — would be higher except she hits the rosé too hard. Solid 10/10 person. Can often be found yelling "get rekt mayo", "shame little boys" and "that is not okay".
Flat Dad: "Taunch was fucked tonight, ay."
Kitchen Bitch: "Seeing as she fell down the wall, yeah."
Person One: "Name ONE person who can beat Abby Lee Miller in a fight."
Person Two: "Taunch."