An Alph-nade is an adjective given to a completly random frag granade thown in a multiplayer video game, which kills one or more opponents. Originated in Halo 2.
When the alph-nader (n00b) has successfully performed an alph-nade, the universal celebration is to to cry "ohhhhhhh omg i R so awsuM!!!!11!!!
During a COD4 session:
Spetsnaz team - "oh for fucks sake they are throwing Alph-nades again"
Man on Spetsnaz team using eavesdrop perk hears - "Ohhhh omg i R so awsuM!!!!11!!!"