there is nothing for that at the moment, but would :multi get you anywhere close to what you want?

thats what i thought of first, but i was unsure "where" the :multi defs belonged in the schema/how i would dispatch

As in, suppose I wrapped multiple :=>'s in the :multi, and I was dispatching based off the first argument of the multi-fn: how should i reference that first argument?

nothing bult-in, but you can use :fn or m/-simple-schema to create such behavior

e.g. [:fn delay?].