其實我係一個逃兵
Actually, I'm a deserter.

Cantonese Sentence Breakdown

其實 kei4 sat6
actually
我 ngo5
I
me
my
us
we
our
self
係 hai6
(Cantonese) to be
to connect
to relate to
to tie up
to bind
to be (literary)
to involve
relation
relationship
consequence
yes
indeed
right
一個 jat1 go3
a; one
逃兵 tou4 bing1
deserter