Definition of roll up:
(interjection) :
an exclamation used to get people's attention to sell something
"roll up, roll up, pies for sale."
(v) :
make into a cylinder by rolling; make into a
bundle
"the shopkeeper had to roll up the poster to make it easier to carry."
(n) :
a self-made
cigarette from tabacco and rolling paper. (Sometimes spelt as roll-up.)
"I smoke roll ups rather then cigs, because they are cheaper."