When your doing something that you dont want other people to know your doing.. something thats sketch
Like selling weed, buying weed, smoking weed!
Search up sketch
(mark) hey come to the park by my house and drop me off a 20 sack.
(josh) uhh can i just meet you at your house?
(mark) why?
(josh) because there's a shit load of people at the park... its sketch topia!