Paul Pry
Peeping Tom
a tale-bearing animal
backseat driver
butt in
butt-in
buttinsky
eavesdropper
fool
gossip
gossip columnist
gossiper
gossipmonger
horn in
informer
inquirer
inquisitive
inquisitor
interfere
interlope
intermeddler
kibitzer
make
marplot
meddler
monkey with
mouse
newsmonger
newspaperman
nose
nosy Parker
nosy parker
numquid
peeper
poke
pragmatic
pragmatist
prier
pry
querier
querist
questioner
quidnunc
deceiver
demagogue
duffer
inquisitiveness
twit