mymethod.rb

class Object
  def my_method(sym)
    MyMethod.new(self, sym)
  end
end

class MyMethod
  def initialize(obj, method)
    @obj, @method = obj, method
  end
  
  def call(*args, &block)
    @obj.send(@method, *args, &block)
  end
end

p "stack overflow".my_method(:length).()