From AMLopedia
come to the hot dog is from the N64 game "Bust-A-Move". At the title screen, a Japanese logo appears and a voice says something that sounds like "come to the hot dog!" However, further research reveals it's actually 「タッチ ザ ハート！」, or "Taachi za haato", which means "touch the heart" in japanglish.
poop in the john day river was another catchphrase that came from Bust-A-Move.