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Prevalence of heavy alcohol use remain high, and daily marijuana use is at an all-time high in young adults. As perceptions of drug effects may guide risky decision making, understanding subjective feelings for alcohol and marijuana use is critical. Existing laboratory-based and diary metrics (0–100 rating of “how drunk/high do you feel?”) may be problematic in differentiating levels of subjective effects. Measures incorporating contemporary language may better capture subjective feelings in experimental and ambulatory assessment designs. We developed 2 sliding scales based on crowd-sourced and rank-ordered feelings of subjective alcohol and marijuana effects. Two US young adult (18–25 years) samples were drawn from Amazon’s Mechanical Turk (MTurk). In the first study, 323 (53.6% women, 68.4% White, M age= 23.0 years) alcohol and marijuana users provided words to describe subjective effects from …