Sometimes used as a way to denote the successful completion of a military mission well underbudget and well within time constraints. Implies they forgot something (see other definition)
If America were to declare war on Canada and launched a full scale nuclear strike, it'd be safe to say that that operation was "wham bam thank you ma'am"
1)strong expression of "no".
2)expressing disbelief
1)Chris: "Hey, you want these tacos I left in the car yesterday?"
Billy: "Ugh! Gross! No ma'am!"
2)Lexy: "Girl, did you hear that Sheila tried to run over her boyfriend last night?"
Kasey: *shocked expression* "No ma'am!"