To faux stab, faux shank, or injury someone only for their discomfort but your and everyone else's amusement whilst singing a Justin Bieber lyric.
*Sneak up on someone with a pen in your hand, as you jab their side you say* "BIEBER!"
or
Singing a Justin Bieber song, you faux-stab on "oooh!" as such..."It's like baby baby baby OOOH!"
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