Giggin does mean "to go stupid dumb on the dancefloor but but i talked to sources who worked with Mac dre and it when you start convulsing after poppin E tooo much and it starts to look like you're dancing.

When someone iz dancin real hard, and doin it well.

To get stupid, go dumb, dance hecka dope

dancin so hard and hecka tight while doin tha thizz face!!! and you dont care who in yo way

A dance in which you move you're body to the beat, letting yourself get loose. It often includes various dances such as "the bird" or "the thizz face".

having fun, to wild out and dance

Thizzin', rollin', poppin' some Ecstasy!