Halloween is now just Halloween or Noche de Brujas. On this day, children dress up as their favorite character. Walking the streets, you will see Batman, fairies, dogs, cats, ninjas, cowboys, princesses, etc. The children will get candy, balloons, ice cream and other gifts in celebration.
Unlike here in the US, where kids go from house to house seeking candy. Most kids are taken to shopping malls or grocery stores (Centros Comerciales) where they ask for and receive candy.
So, what is the Colombian Trick or Treat saying?
It goes like this:
Triqui Triqui Halloween -- Tricky Tricky Halloween
Si no hay dulces para mi -- If there is not candy for me
Se le crece la nariz. -- Your nose will grow.
This is the more sanitized version of the saying -- as in another version, you would threaten to break people's windows if you didn't get candy.