2. Any substance whose purported benefits are wholly unsubstantiated, and whose use can generally be traced to tradition rather than reason. See rhino horn,Extenze.
3. More generally, any belief, system of beliefs, or practice whose efficacy is derived solely from the placebo effect. See homeopathy, reflexology, astrology.
2. Dave bought some Extenze after watching an infomercial; alas, it was mere tiger penis and his dreams of turgidity were shattered.
3. Years of backbreaking labor on the ozymandian islands of Dubai compelled Wayne to seek relief in the tiger penis offered by the local alternative medicine establishment, whose treatments' lack of salubrious effects can be traced to Wayne's rationalism.