Definition

A generously rolled cannabis cigarette, thick enough to require both hands and ambition, typically the recreational equivalent of saying 'I'm about to be unavailable for important decisions for the next few hours.'

Example Usage

He rolled up a spliff the size of a cigar and settled in for a Lord of the Rings marathon.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=spliff&defid=134332)