Food-Nipple Grunt
From Halopedia, the Halo wiki
The Food-Nipple Grunt is an easter egg character that can be found on the Halo: Combat Evolved level, The Maw.
How to
Immediately after the bridge where you see Foehammer go down, go into the tunnel to your right. You will see a lot of bodies, and one live Spec-Ops Grunt. He will sit there, trembling, until you approach. He will look up and say, "I'm sure glad that food-nipple's waiting for me back at the starship 'cause man, have I worked up a big grunty thirst!"
He will say nothing else and will continue to sit there until you kill him, where he will die like any other Grunt.
