The type of girl who has a mellow and laid back disposition. She is is too lazy overall in getting a guy to ask her out or sleeping with her. When he does get to sleep with her she doesn't pretend to fake moan or scream and just lays there. Her tone of voice is monotonous and unexcitable in general in all situations.
Ex. April in Parks and Recreation
Paris Hilton is the opposite of a "No Effort Girl", she tries way too hard to get guys in the sack!