Slang – Abs Slang – Abs. Meaning – Stomach muscles. Abs is an abbreviation for abdominal muscles. A sit-up is an exercise performed in order to strengthen and tone your abs. Example: “I’ve been doing 200 sit-ups a day because I want to have awesome abs!” Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Like this:Like Loading... More English: In Slang abs exercise muscles Slang ← Previous Post Next Post →