Using @extend in mediaqueries.

gistfile1.scss

#views_slideshow_cycle_teaser_section_slideshow-block, 
.views_slideshow_cycle_slide { @extend %cycle-overrides; }

  @include breakpoint(0px $break-slideshow) {
    %cycle-overrides { display: block !important; height: auto !important; position: static !important; opacity: 1 !important; }
  }

  @include breakpoint($break-large) {
    %cycle-overrides { width: 100% !important; }
  }

  @include breakpoint($break-slideshow) {
    %cycle-overrides { height: $slideshow-height !important; }
  }