To agree. Kinda like "yeah" but not quite, there are subtle diversities.
Commonly used expression when consenting to group sex.
In the following examples if "yeah" were used the conversations would
lack sincerity. On the contrary, "us" is
far less causal and evokes genuine
passion.
Examples 1
Kenneth: Oi Johnny
boi, would you tap that
bird?
Johnny
boi: Us! You blind m8! She looks tight as. She'd better be up for a titty fuck too, ya ken?
Kenneth: Us, absolutely!
Examples 2
Maria: Hey George, me and Melanie want your dick. You up for a threesome?
George: Us! Too right Maria!!! Melanie has some fine ass. You're staying on the side my dear. Soz xoxo.