A mythical undergarment that emanates anger. A person who is acting like a bitch, or in a bad mood for no good reason is said to be wearing these.
Watch out for Darrel he has his angry panties on today.
What a girl's hair looks like after she's recently been humped (had sex). Similar to hat head, except it's flat in the back and bushy on the sides and top.
Can also be used to describe a bad female hair style, or one that should only look that bad if she's recently had sex.
Someone should tell that girl to go fix her hump head.