Wiktionary
trifluoromethylphenylpiperazine
n. A particular piperazine-based drug, used recreationally but not medicinally.
Wikipedia
Trifluoromethylphenylpiperazine
3-Trifluoromethylphenylpiperazine (TFMPP) is a recreational drug of the piperazine chemical class. Usually in combination with its analogue benzylpiperazine (BZP), it is sold as an alternative to the illicit drug MDMA ("Ecstasy") under the name "Legal X".