To defaecate (SHIT) in a paint cup or other container and snort the gases produced, resulting in a trailer trash high.
Person 1: Hey wanna get high?
Hick: Yeah, lets go shuff in the back of my dads RV
Person 1: Get the fuck out of hear you trailer trash hick! Thats fucking gross.
Person 2: What the fuck is shuffing?
Person 1: Urban Dictionary bro....
