Anas bin Malik (may Allah be pleased with him) said that the Prophet (peace and blessings be upon him) rebuked (people) against drinking while standing. Qatadah (may Allah have mercy on him) said: We said: What is the ruling on eating? He said: "That is even worse."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14639