Top definition
when you hear/see someone listing watching singing talking thinking about Justin Beiber at the same time that you are.
*both singing at same time*
Girl 1: "I need somebody to love"
Girl 2: "Never Say Never"

*both yelling*

Girl 1: Hey Bitch you Beiber Jackin!!!
Girl 2:What evs hoe I was singing first!!!
by Peric E. Nukka February 15, 2011
Get the mug
Get a Beiber Jackin mug for your daughter Nathalie.