1. fast-pitched baseballs thrown at high velocity
Usage: baseball
2. a combination of stimulant and depressant drugs taken together
Usage: slang; drug terminology

Examples

• The pitcher threw three consecutive speedballs past the batter.
• His speedballs consistently reached 95 miles per hour.
• The rookie struggled to hit the veteran’s speedballs.
• She practiced throwing speedballs during batting practice.
• The catcher called for speedballs with runners on base.