I believe that "rubber baby buggy bumpers" is used as a sobriety test in some jurisdictions.

Though Theophilus Thistledown, the successful thistle sifter, in sifting a sieve full of unsifted thistles, thrust three thousand thistles through the thick of his thumb, see that thou, in sifting a sieve full of unsifted thistles, do not get any of the thistles stuck in thy tongue.