Some days I am myself and say things

When I'm at work I try not to say too much because I tend to say some things that are not professional. Like today on my way back from lunch my team lead and one team manager were walking by us. The team leader said I'll be back. I said my typical come back thanks for the warning and I laughed. Well my one friend said great now I'll have an instant message about that. I was like I wasn't even serious. I laughed after I said it. To me that is it as bad as what others say.