1. (informal) to act or begin too soon or without due caution 
2. To begin a race too soon, before the starting gun goes off

Derived forms: jumped the gun

• paper route
• paper rush
• paper tape
• paper thin
• paper tiger
• paper towel
• paper toweling
• paper trail
• paper wasp
• paper white
• paper-mache
• paper-pusher
• paperback
• paperback book
• paperbacked
• paperbark birch
• paperboard
• paperbound
• paperboy
• paperclip
• paperer
• papergirl
• paperhanger
• paperhanging
• papering