Nothing racist at all, unless you choose to make it so. In the context described, it makes perfect sense.
1. a small narrow opening, such as a fissure or crack
chink in one's armour a small but fatal weakness
Shouldn't we gradually take these terms away from the racists?
I apologise if i've caused any offence, it wasn't meant in that way.
It is all a play, a play on words.
Remains me of the old saying 'there's a nip in the air'. These days, if you said that in certain restaurants with over-enthusiastic air conditioners you could be done for racism.
Humour has been replaced with political correctness and a willingness to over-sensitivity.