pumpy /ˈpʌmpi/adjective 1noun 1forms 3 adjective1 •Intense on the forearms. noun1 •(slang) A pump action shotgun.Hold tight, Asznee (my brudda) / He's got the pumpy (big ting) / Hold tight, my man (my guy) / He's got the frisbee (shew) — 2017 formspumpies · more pumpy · most pumpy