When you turn and begin jacking off in secret from your friend, then turn just before climaxing, yell surprise, and shoot your load into his/her mouth.
Josh: Hey do you remember that time I surprise shot my cum into your mouth?
James: Yeah you Nerf Gunned me hard.
James: Yeah you Nerf Gunned me hard.
by Paikun May 15, 2016
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Nerf Gunned • nerf • nerf herder • Nerf Gun • nerf hearder • Nerf Miner • nerf war • Nerf Bat • nerf ballshot • nerf bullet