Sentence:  Users also report that crystal heightens sexual arousal and increases stamina by delaying orgasm, and they report highly intense orgasms. However, after long-term use, the urge to ejaculate becomes all-comsuming. Impotence is a long-term consequence, and users develop “<WSD>crystal dick</WSD>,” which is the inability to have an erection. 
Meaning of the word marked with <WSD> tags:  Erectile dysfunction caused by methamphetamine use or other drug use.