That's right his name was something like that; I had forgotten that till you mentioned it. Like you, I'm not sure either whether it was tweak or tweep.
Another cartoon they showed many times on SS was with two guys in the dark trying to find a light switch. We only see their eyes. I remember it starts out with a guy saying, "Gosh darn it." The other guy says, "What's the matter?" "Well there's a light here somewhere but I'm not tall enough to reach the string." "Well listen maybe if you found something to stand on you could reach it." Then they feel around and a guy says, "Hey here's something. It kind of feels like sardines." The other guy says, "No, that would be too slippery." Then a guy finds a box. But the other guy says, "I'll fall down". The other guy says, "No you won't." Then he gets on the box and promptly falls off. "I told you I'd fall!" "Oh I'm sorry. Hey maybe if I hold the box steady you can stand on it and reach the string." So they do that and the guy says, "Hey it worked I can reach the string now!" "Hey terrific!" "Okay, I'm gonna turn on the light." Then he switches on the light and we see him standing on the box but the "guy" holding the box is really a monster. So the guy says, "Yuck!" and then turns the light back off. The monster was smiling when the light was first turned on but then stopped smiling once the guy said, "Yuck!".