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1. NOOBTUBER
someone who shoots a grenade out of a grenade launcher on a gun across the map found in call of duty 4 and modern warfare 2
guy#1 he killed me with a grenade from across the map
guy#2 what a NOOBTUBER
2. noobtuber
This refers to a derogatory word used for an online gamer in, xbox 360 and ps3, in two different games. The word noobtuber is often used while playing call of duty 4 live, when a player uses grenade launcher attachments on all of their weapons in order to get cheap kills. They usually cannot get kills any other way. It also refers to halo 3 or halo 2 live, when a player uses a rocket launcher and/or a missle pod, and repeatedly uses it as it keeps spawning.
call of duty 4 example:
Lvl 52 Prestige: That fcking noobtuber keeps hitting me with the m16 launcher when I'm sniping. Someone call a UAV already so I can kill that biatch!

halo 3 example:

Col. Grade 2: Stop spawning our rocket launcher at our base you freaking n0obtuber. This is why covies suck: noobtube central
3. noobtuber
Person who uses a grenade launcher in the call of duty series who sucks balls
stupid noobtuber spawn tubed me and got a multikill..........faggat
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