Drainer ( and palera ) It is an adjective that applies to that person cheat and deceiver, that always takes advantage of entrusted or unwary people to scam them, in the colloquial language or as they say colloquially: " to give stick ".
Colombia is a worker who is engaged in loading dump trucks with a shovel, to load material is usually Earth or sand. A person who works with a shovel.
DRAINER: which is wrong or that is crappy, low quality.
DRAINER: 1: on the boats, the help of the Stoker-2: jib.