If you're using UK slang, it's a cigarette or cigar holder. If you use USA slang, it's either anothermeaningless gay slur insult or slang for a highly gay populated area.
1: My fag sack broke, so all my cigars fell out.
2. Get out of hereyou dumbass fagsack!
3.C'mon man, let's get out of this party, the place is a fag sack....
Is snacks like; flaming hot chickpeas, Celery and carrots with dipping sauce. A fag snack can be a popcorn flavored kettle corn in a cute snack pack size bag. It could be finger foods with hot and spicy sauce. Finger sandwiches like ham salad sandwich. Cucumbers and watercrest with vinegar.