LINES. DELIVERED. WITH. EXTREME! EMPHASIS! ON... EVERY! WORD! ESPECIALLY. THE. ENDING!!!!
This is dialogue transformed into spectacle. It is normally used in Chewing the Scenery and with accordance to the Rule Of Cool. A person who does this often will come across as a Large Ham or just someone with No Indoor Voice. Done badly it can torpedo a dramatic scene. Done well, it can be part of a Moment [...] [tvtropes.org]