speedhead
Someone who abuses or is addicted to an amphetamine, especially methamphetamine. (Also written as "speed head.") This state is a thoroughfare for methamphetamine to the rest of the country, so it's little wonder that there are so many speedheads here.
speed freak
A drug user who abuses or is addicted to an amphetamine, especially methamphetamine (also known as "speed"). This state is a thoroughfare for methamphetamine to the rest of the country, so it's little wonder that there are so many speed freaks here.