The phrase "exclamation point" refers to a punctuation mark (!) used at the end of a sentence to show excitement, emphasis, or strong emotion. Full definition
Anyway, sorry for excitement overload and excessive use of exclamation points on the blog today. (stillbeingmolly.com)
I have a question about the use of exclamation points in cover letters. (careerdigital.com)
He read constantly, even during the worst of his illness, and he would pore over literature on head trauma and brain disease, putting exclamation points in the margins and circling terms that he thought applied to him, such as «ice pick headache» and «disinhibition» and «dysfluency.» (scientificamerican.com)