I always have cheat Friday, where me and my partner will pick something that we would have from a take away and I would make it fit in with my syns and hex's.. so in a way not a cheat but it still is
Tonight I am making pizza with garlic bread and chicken wings with a desert

Pizza - base made with 50g flour and 50g 0% greek yog topped with hexa cheese and lots of free toppings = 8 syns
Garlic Bread = Hexb with Garlic paste 1 syn
Chicken wings, skin removed = free

desert is trifle made with sugar free jelly, small 55g of light custard and some light squirty cream = 5 syns
That's my kind of cheat meal