Ok, so I didn't watch the debate last night (why would I?). I did view the clip in question this morning with the knowledge that some people heard "good" and others "go ahead." Keep in mind that in the conversation of worst presidents in US history I believe the discussion starts and ends with the unindicted co-conspirator. That being said....
He clearly didn't say "good."
He also clearly didn't say "go ahead."
What he said was something like "goo-hud," where the 'goo' sounds like 'good' and the 'hud' sounds kinda like 'hood.' His mouth and jaw clearly didn't make movements that would coincide with 'go ahead,' they look much more like they match with 'good,' but the sound is definitely polysyllabic.
I can think of three possible scenarios:
- He said "good" but mush-mouthed it so bad that it became polysyllabic. I'm disinclined to believe this because he usually doesn't have too much trouble with monosyllabic words. It also doesn't seem like a typical pronunciation error. It is plausible because we know that he sometimes gets mealy-mouthed when his dentures fall out.
- He said "go ahead" but mush-mouthed it so bad that it became a single word. I'm disinclined to believe this because he clearly only says one word, based on his mouth movements. Based on my experience of his speech patterns the words that come out of his pie hole tend to string together into gibberish "sentences" but he doesn't typically speak made-up gibberish words. It is plausible because we know that he sometimes gets mealy-mouthed when his dentures fall out. Also, since he can't speak over and interrupt Biden then imploring the moderator to move on while Biden is still speaking would be the next best thing in his mind.
- He started to say "good" but caught himself and tried to adjust to "go ahead." I'm disinclined to believe this because it assumes Trump has a minimal amount of intelligence, self-awareness and impulse control to recognize that he's going to say something, catch himself, and change his statement mid-word. It is plausible because it most closely matches the sound that came out of his face rectum.