adj, adv - used to describe how weak something or someone's action is. Alternately, may be used simply as an insult, usually in specific situations where the standard run of the mill curse words simply wont suffice.
Ex 1 -
Girl: Hey, let's hang out this weekend.
Guy: That aint gonna happen cuz Im not even in the same state. I moved back home.
Girl: That's lamesauce!
Ex 2 - Dude you are such a lamesauce terdnugget!
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