trifluoromethylphenylpiperazine ⫽ˌtraɪ.flɔːr.oʊˌmɛθ.əl ˌfiː.nəl paɪˈpɪp.ə.rəˌziːn⫽ noun1 •A synthetic psychoactive compound that affects serotonin activity in the brain and has been used recreationally for mood-altering and stimulant-like effects.