1. consuming caffeine, typically by drinking coffee or tea, to increase alertness or energy
Usage: informal; present participle of 'caffeinate'

Examples

• I'm caffeinating before the morning meeting.
• She started her day by caffeinating with a strong cup of coffee.
• We were all caffeinating heavily during exam week.
• He's been caffeinating since 5 a.m. to stay awake.
• The office was full of people caffeinating at the coffee machine.
• I need to stop caffeinating so late in the evening if I want to sleep better.