Used by Eegra in their valentines day comic, where Bowser handed Peach a card with this phrase, and subsequently believes it is a sweet love message. Or something. Whatever the case, it's an exclamation yelled at a loved one that expresses ones awkwardness in a social or romantic situation.
"Happy valentines day! I will tear you a second cunt with my thorny cock!"
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.