explanation mark
something coming out of the mouth of someone not familiar with the word exclamation mark or not knowing how to pronounce it properly
Guy A: Oh, this food is horrible! I hate our school meals, exclamation mark!
Guy B: Yeah, and it is getting worse...
Guy C (stupid): Haha, yeah! Explanation mark!
Guy B: Yeah, and it is getting worse...
Guy C (stupid): Haha, yeah! Explanation mark!