1. The person or instrument that pumps.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• prper,
• pumple,
• pammer,
• paaper,
• pumpt,
• emper,
• pamer,
• bumoper,
• pumpin,
• pumpes,
• pamperd,
• numper,
• pummped,
• bmper,
• pumpo,
• payper,
• parper,
• pemier,
• bamper,
• pumber

The plural of the "Pumper" can be the "pumpers".

The singular of the "Pumper" can be the "Pumper".