Not to be confused with the
down low, lowdown means what it says. It describes a
person who is,
mean,
despicable,
rotten.
No good,
spiteful,
hateful.
Corrupt,
vicious,
evil.
Most often heard in Westerns:
CowboyOne: They shot Jake up at the ranch!!!
CowboyTwo: Let's go get the lowdown varmints!!!
Yes, often used in conjunction with varmint.