Not sure how up to date this is but:
access-list acl_outside deny ip 0.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 1.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 2.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 5.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 10.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 14.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 23.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 27.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 31.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 36.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 37.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 39.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 42.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 46.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 49.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 50.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 100.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 101.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 102.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 103.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 104.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 105.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 106.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 107.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 108.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 109.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 110.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 111.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 127.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 169.254.0.0 0.0.255.255 any
access-list acl_outside deny ip 172.16.0.0 0.15.255.255 any
access-list acl_outside deny ip 175.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 176.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 177.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 178.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 179.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 180.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 181.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 182.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 183.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 184.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 185.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 192.0.2.0 0.0.0.255 any
access-list acl_outside deny ip 192.168.0.0 0.0.255.255 any
access-list acl_outside deny ip 197.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 223.0.0.0 0.255.255.255 any
access-list acl_outside deny ip 224.0.0.0 31.255.255.255 any
access-group acl_outside in interface outside