fat or 'sui chong'? (cantonese->water retention)

during lunch today, this not so close colleague of mine, out of sudden and no where held my arm tight and looked into my eyes with this serious someone's dying look and asked me, 'binwei, are you fat or sui chong?'.

my reaction? : i was stunned for a moment. A few moments.

then she pressed my arm and started poking my arms to test, and said, this doesnt look like water retention. and she still had that -i am so worried, are you dying look in her face.

i looked up at her disbelievingly, and asked her back, 'so its fat u mean?'

WTH?

i headed off to gym at 5.30pm sharp today, and broke my own record of running at speed 8.0 for 20 minutes non stop until i 'pk' on the treadmill.