Noodleback
when a woman feels sexy, wearing lingerie, and is relaxed like a soft noodle.
She got dressed up to go out on a date night and was feeling like a noodleback.
noodlebacking
When someone claims to have changed old behavior, but is actively engaging in said behavior secretly. This term can be used in a variety of circumstances, but is particularly appropriate when referring to sexual relationships between clients within a rehab center.
Tim told me he wasn't flirting with Sarah anymore, but I caught them talking dirty over facetime - he's noodlebacking hard.