all the more reason for

all the more reason for (doing something) and all the more reason to (do something)

with even better reason or cause for doing something. (Can be included in a number of grammatical constructions.) Bill: I don't do well in calculus because I don't like the stuff. Father: All the more reason for working harder at it. Bob: I'm tired of painting this fence. It's so old it's rotting! Sally: All the more reason to paint it.

See also: more, reason