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1.
To flex your bicep and kiss it in celebratory fashion. Inspired and trademarked by San Francisco 49ers quarterback Colin Kaepernick.
Colin Kaepernick just ran for a touchdown to take the lead and is showing his celebration by kaepernicking to the crowd.
by Technyze January 24, 2013
 
2.
To flex your biceps while doing random things the way San Francisco quarterback Colin Kaepernick does when he scores touchdowns.
After a good workout I start Kaepernicking before I leave the gym
by ThisDatBoiD January 16, 2013