Merghhh: A term of expression used to...
a) Scare someone after tapping them on shoulder
b) Show a certain level of uncomfort
c) Show interest
a)... *Jeff creeps up behind Sam*
Sam: "Huh, WHAT THE!"...
b) Barry: Sup Dan?
Dan: MERGHH! My parents invited Mr. Palmer for dinner!
c) James: OMG! MILF ALERT
Kevin: Where, Where!?
James: Dude quick, at 12 O' Clock!
Kevin: OH...;) MERGHH!