Cheesy Cum Surprise

The act of ejaculating in your friends mailbox multiple times while he/she is on vacation, then letting it sit till they return. When they arrive home they will certainly have a surprise waiting for them in their mailbox

Phil: Dude i left jenna and her family a Cheesy Cum Surprise while she was in hawaii.

Chris: Hahahahaha that'll be the best surprise shes gotten since she woke up pregnant in mexico