Fresh meat
SHOULD have a smell. Raw, blood-like smell.
Rancid or rotten meat will smell just BAD. Turn-your-stomach bad.
If you have a question about it, slice off a small corner and fry it in a hot pan with oil, no salt or pepper.
If bad, it will taste as bad as it probably smells.
Don't mistake gameness for bad or tainted meat. Venison should NOT taste like Cow.
YMMV.