Originally Posted by
ritz
He was being sarcastic.
sar·casm
Pronunciation[sahr-kaz-uhm] –noun
1. harsh or bitter derision or irony.
2. a sharply ironical taunt; sneering or cutting remark: a review full of sarcasms.
Yes, a metaphor
Metaphor:
1. a figure of speech in which a term or phrase is applied to something to which it is not literally applicable in order to suggest a resemblance, as in “A mighty fortress is our God.” Compare mixed metaphor, simile (def. 1).
2. something used, or regarded as being used, to represent something else; emblem; symbol.