In
Colombian slang it means 'really fast' (
rápido). It can also mean 'really loud' (
pone la música a todo taco), applying the
fuerte meaning.
This phrase is only used in
Colombia.
Another site suggests that it means 'to go all out' (still referring to Colombian slang). There's a restaurant called
A Todo Taco in Bogotá, Colombia, where Mexican food is served. Reviews can't say enough about the place, so it seems they go all out to please the palate.